Back to destinations
AI-generated illustrative scene; not a photograph of this destination
AI-generated
Estonia

Ruhnu weather & best time to visit

Sun, sea & sand

Ruhnu at a glance

Best time
Jul – Aug
Warmest month
Jul · 21°
Warmest sea
Aug · 18.3°
Sunshine a year
2,120 h
Rain a year
673 mm
Climate
Maritime
Time zone
UTC+2 / UTC+3
Elevation
20 m

Climate in Ruhnu

Ruhnu has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 21 °C, while February is the coolest at 0 °C. With around 2,120 hours of sunshine a year, Ruhnu is moderately sunny; July is the sunniest month with 10.7 hours a day.

Holiday weather through the year

Best time to visit

Best time to visit Ruhnu

The best time to visit Ruhnu is from July to August. The sea stays too cool for a classic beach holiday: even in August it only reaches 18.3 °C. For sightseeing, day trips and hiking, conditions are most comfortable from June to July and in September. Rain is frequent from October to January; the wettest month is October with 85 mm.

Ruhnu through the seasons

How the weather changes over the seasons, with averages for each.

Ruhnu in spring

Mar – May

29

Poor

  • 2–12 °C by day
  • Sea 4 °C
  • 7.6 h of sun a day
  • 22 rainy days in all

Ruhnu in summer

Jun – Aug

39

Poor

  • 17–21 °C by day
  • Sea 16 °C
  • 10.1 h of sun a day
  • 32 rainy days in all

Ruhnu in autumn

Sep – Nov

10

Poor

  • 6–17 °C by day
  • Sea 12 °C
  • 3.7 h of sun a day
  • 42 rainy days in all

Ruhnu in winter

Dec – Feb

8

Poor

  • 0–4 °C by day
  • Sea 3 °C
  • 1.6 h of sun a day
  • 37 rainy days in all

Which month for what?

Beach & swimming

No month

Sea from 21 °C, warm and mostly dry

Sightseeing & hiking

Jun – Jul, Sep

15–28 °C and not too much rain

Rainy months

Oct – Jan

Rainy season or more than 12 rainy days

Snow

Nov – Mar

Snow on 2 or more days

Find your perfect month

Tell us what you like and we rate every month in Ruhnu for you.

Swimming in the sea
Sunshine
Little rain

Your best months: May, July – August

Based on the climate averages; tap a month to see its details.

Your holiday weather, at a glance

Weather in October

Weather in October

6

Holiday weather in October

Poor

Best time to visit: July – August

Keep in mindFrequent rain

A typical day in October

  1. Morning, 08:00: about 7°
  2. Midday, 13:00: about 11°
  3. Afternoon, 16:00: about 11°
  4. Evening, 20:00: about 10°
  5. Night, 23:00: about 9°

07:5918:26

Cold evenings: bring a warm jacket.

Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.

Light for photos in October

Golden hour
Morning 07:35–08:54 · evening 17:31–18:50
Blue hour
Morning 07:20–07:35 · evening 18:50–19:05

Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.

October in Ruhnu compared with home

Home:

Loading the climate at home …

Early or late October?

In October, daytime highs fall from about 14° at the start of the month to 9° at the end. The sea cools from 13° to 9°. The days get 2.4 h shorter.

Early or late October?
October1 Oct31 Oct
Daytime high14°9°
Night-time low10°5°
Sea13°9°
Daylight11.6 h9.2 h

What is the weather like in Ruhnu in October?

In October, Ruhnu is cool: daytime highs average 11 °C, and nights cool down to about 7 °C. The sea averages 11.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3.5 hours a day. It rains often – on about 15 days, adding up to 85 mm. It is often windy: on a typical day the wind peaks at around 37 km/h. All in all, October is not an ideal month for a holiday in Ruhnu.

More details for October

Daylight
10 h 27 min07:59 – 18:26
UV index
1 · lowclear sky, noon (estimate)All months
Muggy days
0 daysdew point 18 °C or moreAll months
Wind
37 km/haverage daily peakAll months
Cloud cover
73 %on averageAll months
Hot days
0 days30 °C or more
Snow days
0 days1 cm or more of fresh snowAll months
Time zone
UTC+3offset from UTC

How the score comes together

  • Temperatureweight 35 %0 %
  • Seaweight 25 %0 %
  • Sunshineweight 20 %8 %
  • Few rainy daysweight 20 %20 %

Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.

What to pack in October

  • A jumper for the evenings
  • Rain jacket or umbrella
  • Windproof jacket

Compare two months in Ruhnu

Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.

vs

July has the better holiday weather in Ruhnu: score 43 against 6. In July, days are 10 °C warmer than in October. The sea is 6 °C warmer in July. July has 5 fewer rainy days. The sun shines 7 hours longer a day in July.

October vs July, Ruhnu
MonthOctoberJuly
Holiday weather score643better
Daytime high11°21°
Night-time low7°16°
Sea11.3°17.6°
Sunshine3.5 h10.7 hbetter
Rainy days1510better
Rainfall85 mm68 mmbetter
Muggy days0better4

Based on the climate averages 1996–2025.

Ruhnu month by month

The typical weather for every month at a glance.

8January1° · Sea 2° · 1.3 h

In January, Ruhnu is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−2 °C). The sea averages 2.3 °C – swimming is only for the hardy. The sun is scarce, with only about 1.3 hours a day. Precipitation falls on about 13 days, totalling 51 mm; on about 7 of them it snows. It is often windy: on a typical day the wind peaks at around 38 km/h. All in all, January is not an ideal month for a holiday in Ruhnu.

Ruhnu in January
11February0° · Sea 1° · 2.6 h

In February, Ruhnu is bitterly cold: daytime highs average 0 °C, and nights often drop below freezing (−3 °C). The sea averages 0.9 °C – swimming is only for the hardy. The sun is scarce, with only about 2.6 hours a day. Precipitation falls on about 10 days, totalling 38 mm; on about 6 of them it snows. It is often windy: on a typical day the wind peaks at around 35 km/h. All in all, February is not an ideal month for a holiday in Ruhnu.

Ruhnu in February
21March2° · Sea 1° · 5.1 h

In March, Ruhnu is bitterly cold: daytime highs average 2 °C, and nights often drop below freezing (−1 °C). The sea averages 0.9 °C – swimming is only for the hardy. Expect around 5.1 hours of sunshine a day. Precipitation falls on about 8 days, totalling 31 mm; on about 3 of them it snows. It is often windy: on a typical day the wind peaks at around 32 km/h. All in all, March is not an ideal month for a holiday in Ruhnu.

Ruhnu in March
30April6° · Sea 3° · 7.4 h

In April, Ruhnu is cold: daytime highs average 6 °C, and nights cool down to about 2 °C. The sea averages 2.7 °C – swimming is only for the hardy. The sun shines for around 7.4 hours a day. Rain falls on about 7 days, adding up to 32 mm. It is often windy: on a typical day the wind peaks at around 30 km/h. All in all, April is not an ideal month for a holiday in Ruhnu.

Ruhnu in April
36May12° · Sea 8° · 10.4 h

In May, Ruhnu is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 7.6 °C – swimming is only for the hardy. With around 10.4 hours of sunshine a day, there is plenty of sun. Rain falls on about 7 days, adding up to 33 mm. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, May is not an ideal month for a holiday in Ruhnu.

Ruhnu in May
33June17° · Sea 13° · 10.5 h

In June, Ruhnu is mild: daytime highs average 17 °C, and nights cool down to about 13 °C. The sea averages 13.4 °C – swimming is only for the hardy. With around 10.5 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 9 rainy days and 54 mm in total. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, June is not an ideal month for a holiday in Ruhnu.

Ruhnu in June
43July21° · Sea 18° · 10.7 h

In July, Ruhnu is mild: daytime highs average 21 °C, and nights cool down to about 16 °C. The sea averages 17.6 °C – bracing, so a wetsuit helps for longer swims. With around 10.7 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 10 rainy days and 68 mm in total. It is often windy: on a typical day the wind peaks at around 29 km/h. All in all, July is a so-so month for a holiday in Ruhnu – and yet one of the best months here.

Ruhnu in July
41August21° · Sea 18° · 9.2 h

In August, Ruhnu is mild: daytime highs average 21 °C, and nights cool down to about 16 °C. The sea averages 18.3 °C – bracing, so a wetsuit helps for longer swims. With around 9.2 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 12 rainy days and 84 mm in total. It is often windy: on a typical day the wind peaks at around 30 km/h. All in all, August is a so-so month for a holiday in Ruhnu – and yet one of the best months here.

Ruhnu in August
20September17° · Sea 16° · 6.3 h

In September, Ruhnu is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 15.6 °C – swimming is only for the hardy. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 67 mm in total. It is often windy: on a typical day the wind peaks at around 33 km/h. All in all, September is not an ideal month for a holiday in Ruhnu.

Ruhnu in September
6October11° · Sea 11° · 3.5 h

In October, Ruhnu is cool: daytime highs average 11 °C, and nights cool down to about 7 °C. The sea averages 11.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3.5 hours a day. It rains often – on about 15 days, adding up to 85 mm. It is often windy: on a typical day the wind peaks at around 37 km/h. All in all, October is not an ideal month for a holiday in Ruhnu.

Ruhnu in October
4November6° · Sea 8° · 1.4 h

In November, Ruhnu is cold: daytime highs average 6 °C, and nights cool down to about 3 °C. The sea averages 7.8 °C – swimming is only for the hardy. The sun is scarce, with only about 1.4 hours a day. It rains often – on about 15 days, adding up to 72 mm. Snow falls on about 2 days. It is often windy: on a typical day the wind peaks at around 38 km/h. All in all, November is not an ideal month for a holiday in Ruhnu.

Ruhnu in November
5December4° · Sea 5° · 0.9 h

In December, Ruhnu is cold: daytime highs average 4 °C, and nights cool down to about 0 °C. The sea averages 4.7 °C – swimming is only for the hardy. The sun is scarce, with only about 0.9 hours a day. Precipitation falls on about 14 days, totalling 60 mm; on about 5 of them it snows. It is often windy: on a typical day the wind peaks at around 39 km/h. All in all, December is not an ideal month for a holiday in Ruhnu.

Ruhnu in December

Climate in detail

Year & climate table

Climate through the year

Long-term monthly averages. Tap a month to see its details.

Best time to visit

Nights and sleep in Ruhnu

How warm the nights get in each month, from the mean night-time low. Tap a month for details.

  • Frost below 0°
  • Cold 0–8°
  • Cool 8–15°
  • Pleasant 15–20°

ColdOctober: nights around 7°. The room should be heated.

The coolest nights are in February (−3°), the warmest in July (16°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from October to May, so the room should be heated.

Temperatures through the year

Average daytime high, night-time low and sea temperature per month.

OctoberDay 11°Night 7°Sea 11°
DayNightSea
MonthScoreDayNightSeaSunRain daysRain mm
JanuaryJan81°−2°2.3°1.3 h1351
FebruaryFeb110°−3°0.9°2.6 h1038
MarchMar212°−1°0.9°5.1 h831
AprilApr306°2°2.7°7.4 h732
MayMay3612°7°7.6°10.4 h733
JuneJun3317°13°13.4°10.5 h954
JulyJul4321°16°17.6°10.7 h1068
AugustAug4121°16°18.3°9.2 h1284
SeptemberSep2017°12°15.6°6.3 h1267
OctoberOct611°7°11.3°3.5 h1585
NovemberNov46°3°7.8°1.4 h1572
DecemberDec54°0°4.7°0.9 h1460

Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences

57.80° N, 23.25° E · 20 m · Europe/Tallinn

Sea temperature
Swimming calendar

Sea temperature in Ruhnu

Monthly sea surface temperature with the range of cooler and warmer years.

Sea in October11.3°Ccold

8 in 10 years: 10.0 – 12.6 °C

Swimming season: Always below 20 °C

  • cold
  • fresh
  • refreshing
  • pleasant
  • warm
  • very warm
OctoberMean sea temperature 11.3°8 in 10 years 10.0° – 12.6°
20°
Mean sea temperature8 in 10 years20 °C – comfortable for swimming

The sea temperature in Ruhnu ranges from 0.9 °C in February to 18.3 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.

The sea warms up slowly: it is warmest in August, while the air already peaks in July. From October to February the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 17.2 and 19.8 °C.

Sea temperature by month
MonthAverageCool yearWarm yearFeels
JanuaryJan2.3°0.9°3.8°cold
FebruaryFeb0.9°−0.2°1.7°cold
MarchMar0.9°−0.1°1.9°cold
AprilApr2.7°1.0°4.0°cold
MayMay7.6°5.8°9.9°cold
JuneJun13.4°11.4°15.4°cold
JulyJul17.6°15.6°19.3°fresh
AugustAug18.3°17.2°19.8°fresh
SeptemberSep15.6°14.4°16.8°cold
OctoberOct11.3°10.0°12.6°cold
NovemberNov7.8°6.5°8.9°cold
DecemberDec4.7°3.3°6.3°cold
Sunshine
Sunshine

Sunshine hours in Ruhnu

Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.

Per year
2,120 hours
Sunniest month
Jul · 10.7 h a day
Least sunshine
Dec · 0.9 h a day
OctoberSunshine 3.5 hDaylight 10.4 hShare of daylight 34 %
SunshineDaylight

In October, the sun shines for about 3.5 of 10.4 hours of daylight in Ruhnu, 34 % of the daylight hours.

Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.

Rain
Rain

Rain in Ruhnu: rainy days and rainfall

A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.

Per year
673 mm on 133 days
Wettest month
Oct · 85 mm
Driest month
Mar · 31 mm
OctoberRainy days 15Rainfall 85 mm

In October, Ruhnu has about 15 rainy days with 85 mm of rain in total.

UV index
Sun protection

UV index in Ruhnu

How strong the sun is at noon, month by month, and how quickly unprotected skin burns.

Clear-sky UV in October
1 · lowLittle protection needed; sunglasses on bright days.

The sun is strongest in June (UV 6).

Minutes until sunburn in October

Very fair skin
over 2 h
Fair skin
over 2 h
Light brown skin
over 2 h
Olive skin
over 2 h

Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.

Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.

Wind & clouds
Wind & clouds

Wind and clouds in Ruhnu

How breezy and how cloudy Ruhnu is through the year. Tap a month to select it on the whole page.

Wind

Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.

Year average
33 km/h · fresh breeze
Windiest month
Dec · 39 km/h
Calmest month
May · 28 km/h
OctoberWind 37 km/hBeaufort 5
20
WindBeaufort 4

In October, the wind in Ruhnu typically peaks at 37 km/h during the day: Beaufort 5, fresh breeze.

Breezy months for windsurfing and kiting

From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it is that strong all year.

Clouds

Average share of the sky covered by cloud, day and night.

Year average
66 % · mostly cloudy
Clearest month
May · 50 %
Cloudiest month
Jan · 85 %
OctoberCloud cover 73 %Sunshine 3.5 h

In October, cloud covers on average 73 % of the sky over Ruhnu: mostly cloudy, with about 3.5 hours of sunshine a day.

Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.

Snow
Snow

Snow in Ruhnu

When Ruhnu is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.

Snow days a year
24 days
Fresh snow a year
79 cm
Snowy months
Jan – Feb

Snow calendar

  • hardly any
  • possible
  • likely
  • very likely
OctoberDays with fresh snow 0Fresh snow 0 cmChance of snow 1 / 100

In October, it hardly ever snows in Ruhnu.

Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.

Planning a trip to Ruhnu

Weather for your travel dates

Pick your arrival and length of stay, and we sum up the weather to expect.

Ruhnu in the school holidays

How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.

Ruhnu has its best school-holiday weather during the summer holidays (score 42) and its weakest during October half-term (score 6).

  • Easter holidays

    Mar – Apr

    27

    Poor

    • 5 °C by day
    • Sea 2 °C
    • 6.7 h of sun a day
    • 7 rainy days a month

    Keep in mind: Snow

  • May half-term

    May – Jun

    35

    Poor

    • 13 °C by day
    • Sea 9 °C
    • 10.4 h of sun a day
    • 7 rainy days a month
  • Summer holidays

    Jul – Aug

    42

    FairBest holidays

    • 21 °C by day
    • Sea 18 °C
    • 9.7 h of sun a day
    • 12 rainy days a month
  • October half-term

    Oct

    6

    Poor

    • 11 °C by day
    • Sea 11 °C
    • 3.5 h of sun a day
    • 15 rainy days a month

    Keep in mind: Frequent rain

  • Christmas holidays

    Dec – Jan

    7

    Poor

    • 2 °C by day
    • Sea 4 °C
    • 1.1 h of sun a day
    • 14 rainy days a month

    Keep in mind: Frequent rain, Snow

Based on the climate averages 1996–2025.

Getting there

Flying from

Nonstop flight
about 2 h 30 min
Distance
1,670 km
Time zone
UTC+3
Jet lag
Hardly any (under 3 h)

Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.

Good to know: Estonia

Currency
Euro (EUR)
Language
Estonian
Sockets
Type C, F · 230 V
Traffic
Drives on the right
Dialling code
+372
Emergency number
112

UK plugs need a travel adapter

Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.

Compare & alternatives

Compare with another place
Compare

Ruhnu compared

Put Ruhnu side by side with another destination.

Nearby:
Compare with home:

Ruhnu vs Kuressaare

In October Kuressaare has the better holiday weather (score 11 vs 6). During the day it is about as warm in Kuressaare as in Ruhnu. The sea is about equally warm. Kuressaare gets one hour less sunshine a day.

Ruhnu vs Kuressaare, in October
in OctoberRuhnuKuressaare
Holiday weather score611
Daytime high11°11°
Sea11°11°
Sunshine4 h3 h
Rainy days1511
Best timeJul – AugJul – Aug

Through the year

OctoberRuhnu 11°Kuressaare 11°
RuhnuKuressaare
Go to Kuressaare
Best places in the country
Ranking

Estonia in October: the best places

In October, Ruhnu ranks 14 of 15 destinations in this country.

  1. Tartu10°22
  2. 2Võru10°22
  3. 3Valga10°21
  4. 4Viljandi9°20
  5. 5Tallinn10°11°20
  6. 6Rakvere9°20
  7. 7Narva9°17
  8. 8Kuressaare11°11°11
  9. 14RuhnuThis page11°11°6
All destinations: Estonia
Places nearby

Near Ruhnu

Other destinations close by.

Places with a similar climate

Places with a climate like Ruhnu

Destinations whose weather through the year is closest to Ruhnu's – good alternatives.

  1. 86 % similar7HankoFinland10°11°Best time: May – Jul
  2. 85 % similar7PaldiskiEstonia10°11°Best time: Jul – Aug
  3. 82 % similar10RaseborgFinland10°11°Best time: Jul
  4. 81 % similar10KirkkonummiFinland10°11°Best time: May, Jul

Frequently asked questions about Ruhnu

When is the best time to visit Ruhnu?

The best time to visit Ruhnu is from July to August. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.

How warm is the sea in Ruhnu?

The sea temperature in Ruhnu ranges from 0.9 °C in February to 18.3 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.

Can you swim in Ruhnu in October?

Only if you don't mind cold water: in October the sea averages just 11.3 °C. Comfortable swimming temperatures are not reached at any time of year.

What is the warmest month in Ruhnu?

July is the warmest month, with average highs of 21 °C and nights around 16 °C. February is the coolest month at 0 °C.

When does it rain most in Ruhnu?

Rain is frequent from October to January; the wettest month is October with 85 mm. The driest month is March with 31 mm.

How many hours of sunshine does Ruhnu get?

Ruhnu gets around 2,120 hours of sunshine a year. The sunniest month is July with 10.7 hours a day; in December there are 0.9 hours a day.

What time zone is Ruhnu in?

Ruhnu is on UTC+2 in January and UTC+3 in July.

How long is the flight from London to Ruhnu?

A nonstop flight from London to Ruhnu takes about 2 h 30 min, for a straight-line distance of about 1,670 km.

Which school holidays are best for Ruhnu?

Ruhnu has its best school-holiday weather during the summer holidays (score 42) and its weakest during October half-term (score 6). Holiday ratings (0–100): Easter holidays 27, May half-term 35, summer holidays 42, October half-term 6, Christmas holidays 7.