AI-generatedIi at a glance
- Best time
- Jul
- Warmest month
- Jul · 21°
- Warmest sea
- Aug · 16.2°
- Sunshine a year
- 1,710 h
- Rain a year
- 641 mm
- Climate
- Continental
- Time zone
- UTC+2 / UTC+3
- Elevation
- 12 m
Climate in Ii
Ii has mild to warm summers and cold winters with occasional snow. July is the warmest month with average highs of 21 °C, while January is the coolest at −5 °C. With around 1,710 hours of sunshine a year, Ii is moderately sunny; June is the sunniest month with 9.5 hours a day.
Holiday weather through the year
Best time to visit Ii
The best time to visit Ii is in July. The sea stays too cool for a classic beach holiday: even in August it only reaches 16.2 °C. For sightseeing, day trips and hiking, conditions are most comfortable in June. Rain is frequent in August; the wettest month is July with 82 mm.
Ii through the seasons
How the weather changes over the seasons, with averages for each.
Ii in spring
Mar – May
Poor
- 0–12 °C by day
- Sea 1 °C
- 6.7 h of sun a day
- 25 rainy days in all
Ii in summer
Jun – Aug
Poor
- 18–21 °C by day
- Sea 14 °C
- 8.5 h of sun a day
- 35 rainy days in all
Ii in autumn
Sep – Nov
Poor
- 1–13 °C by day
- Sea 8 °C
- 2.5 h of sun a day
- 34 rainy days in all
Ii in winter
Dec – Feb
Poor
- −5–−3 °C by day
- Sea 0 °C
- 1.0 h of sun a day
- 30 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Jun
15–28 °C and not too much rain
Rainy months
Aug
Rainy season or more than 12 rainy days
Snow
Oct – Apr
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Ii for you.
Your best months: July
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Poor
Best time to visit: July
Where to go in OctoberSea temperature in October
Keep in mindSnow
A typical day in October
- Morning, 08:00: about 1°
- Midday, 13:00: about 5°
- Afternoon, 16:00: about 6°
- Evening, 20:00: about 4°
- Night, 23:00: about 2°
08:0917:59
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 07:38–09:22 · evening 16:46–18:31
- Blue hour
- Morning 07:18–07:38 · evening 18:31–18:50
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 Ii compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 9° at the start of the month to 3° at the end. The sea cools from 10° to 5°. The days get 3.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 9° | 3° |
| Night-time low | 3° | −2° |
| Sea | 10° | 5° |
| Daylight | 11.4 h | 8.0 h |
What is the weather like in Ii in October?
In October, Ii is cold: daytime highs average 6 °C, and nights cool down to about 1 °C. The sea averages 7.7 °C – swimming is only for the hardy. The sun is scarce, with only about 2.3 hours a day. Rain is frequent, with about 11 rainy days and 62 mm in total. Snow falls on about 2 days. All in all, October is not an ideal month for a holiday in Ii.
More details for October
- Daylight
- 9 h 50 min08:09 – 17:59
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 77 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 2 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 %0 %
- Few rainy daysweight 20 %47 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Compare two months in Ii
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Ii: score 41 against 9. In July, days are 15 °C warmer than in October. The sea is 8 °C warmer in July. July has 2 more rainy days. The sun shines 7 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 9 | 41better |
| Daytime high | 6° | 21° |
| Night-time low | 1° | 12° |
| Sea | 7.7° | 15.8° |
| Sunshine | 2.3 h | 9.1 hbetter |
| Rainy days | 11better | 13 |
| Rainfall | 62 mmbetter | 82 mm |
| Muggy days | 0better | 1 |
Based on the climate averages 1996–2025.
Ii month by month
The typical weather for every month at a glance.
12January−5° · Sea 0° · 0.5 h
In January, Ii is bitterly cold: daytime highs average −5 °C, and nights often drop below freezing (−12 °C). The sea averages −0.1 °C – swimming is only for the hardy. The sun is scarce, with only about 0.5 hours a day. Precipitation falls on about 10 days, totalling 40 mm; on about 9 of them it snows. All in all, January is not an ideal month for a holiday in Ii.
Ii in January13February−5° · Sea 0° · 2.4 h
In February, Ii is bitterly cold: daytime highs average −5 °C, and nights often drop below freezing (−13 °C). The sea averages −0.2 °C – swimming is only for the hardy. The sun is scarce, with only about 2.4 hours a day. Precipitation falls on about 9 days, totalling 36 mm; on about 8 of them it snows. All in all, February is not an ideal month for a holiday in Ii.
Ii in February20March0° · Sea 0° · 4.7 h
In March, Ii is bitterly cold: daytime highs average −1 °C, and nights often drop below freezing (−9 °C). The sea averages −0.1 °C – swimming is only for the hardy. Expect around 4.7 hours of sunshine a day. Precipitation falls on about 8 days, totalling 32 mm; on about 7 of them it snows. All in all, March is not an ideal month for a holiday in Ii.
Ii in March28April5° · Sea 0° · 7.0 h
In April, Ii is cold: daytime highs average 5 °C, and nights often drop below freezing (−3 °C). The sea averages 0.2 °C – swimming is only for the hardy. The sun shines for around 7.0 hours a day. Rain falls on about 8 days, adding up to 34 mm. Snow falls on about 3 days. All in all, April is not an ideal month for a holiday in Ii.
Ii in April30May12° · Sea 3° · 8.4 h
In May, Ii is cool: daytime highs average 12 °C, and nights cool down to about 3 °C. The sea averages 2.9 °C – swimming is only for the hardy. The sun shines for around 8.4 hours a day. Rain is frequent, with about 10 rainy days and 49 mm in total. All in all, May is not an ideal month for a holiday in Ii.
Ii in May32June18° · Sea 11° · 9.5 h
In June, Ii is mild: daytime highs average 18 °C, and nights cool down to about 9 °C. The sea averages 10.8 °C – swimming is only for the hardy. With around 9.5 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 10 rainy days and 59 mm in total. All in all, June is not an ideal month for a holiday in Ii.
Ii in June41July21° · Sea 16° · 9.1 h
In July, Ii is warm: daytime highs average 21 °C, and nights cool down to about 12 °C. The sea averages 15.8 °C – swimming is only for the hardy. With around 9.1 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 13 rainy days and 82 mm in total. All in all, July is a so-so month for a holiday in Ii – and yet one of the best months here.
Ii in July22August19° · Sea 16° · 7.0 h
In August, Ii is mild: daytime highs average 19 °C, and nights cool down to about 10 °C. The sea averages 16.2 °C – swimming is only for the hardy. The sun shines for around 7.0 hours a day. Rain is frequent, with about 12 rainy days and 80 mm in total. All in all, August is not an ideal month for a holiday in Ii.
Ii in August14September13° · Sea 13° · 4.4 h
In September, Ii is cool: daytime highs average 13 °C, and nights cool down to about 6 °C. The sea averages 12.7 °C – swimming is only for the hardy. Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 65 mm in total. All in all, September is not an ideal month for a holiday in Ii.
Ii in September9October6° · Sea 8° · 2.3 h
In October, Ii is cold: daytime highs average 6 °C, and nights cool down to about 1 °C. The sea averages 7.7 °C – swimming is only for the hardy. The sun is scarce, with only about 2.3 hours a day. Rain is frequent, with about 11 rainy days and 62 mm in total. Snow falls on about 2 days. All in all, October is not an ideal month for a holiday in Ii.
Ii in October10November1° · Sea 3° · 0.7 h
In November, Ii is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−4 °C). The sea averages 3.2 °C – swimming is only for the hardy. The sun is scarce, with only about 0.7 hours a day. Precipitation falls on about 11 days, totalling 54 mm; on about 6 of them it snows. All in all, November is not an ideal month for a holiday in Ii.
Ii in November9December−3° · Sea 1° · 0.0 h
In December, Ii is bitterly cold: daytime highs average −3 °C, and nights often drop below freezing (−9 °C). The sea averages 0.8 °C – swimming is only for the hardy. There is practically no direct sunshine: the sun barely rises above the horizon. Precipitation falls on about 12 days, totalling 49 mm; on about 9 of them it snows. All in all, December is not an ideal month for a holiday in Ii.
Ii in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Ii
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°
ColdOctober: nights around 1°. The room should be heated.
The coolest nights are in February (−13°), the warmest in July (12°). Nights fall below 8 °C on average from September to May, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 12 | −5° | −12° | −0.1° | 0.5 h | 10 | 40 |
| FebruaryFeb | 13 | −5° | −13° | −0.2° | 2.4 h | 9 | 36 |
| MarchMar | 20 | −1° | −9° | −0.1° | 4.7 h | 8 | 32 |
| AprilApr | 28 | 5° | −3° | 0.2° | 7.0 h | 8 | 34 |
| MayMay | 30 | 12° | 3° | 2.9° | 8.4 h | 10 | 49 |
| JuneJun | 32 | 18° | 9° | 10.8° | 9.5 h | 10 | 59 |
| JulyJul | 41 | 21° | 12° | 15.8° | 9.1 h | 13 | 82 |
| AugustAug | 22 | 19° | 10° | 16.2° | 7.0 h | 12 | 80 |
| SeptemberSep | 14 | 13° | 6° | 12.7° | 4.4 h | 11 | 65 |
| OctoberOct | 9 | 6° | 1° | 7.7° | 2.3 h | 11 | 62 |
| NovemberNov | 10 | 1° | −4° | 3.2° | 0.7 h | 11 | 54 |
| DecemberDec | 9 | −3° | −9° | 0.8° | 0.0 h | 12 | 49 |
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
65.32° N, 25.37° E · 12 m · Europe/Helsinki
Sea temperature
Sea temperature in Ii
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 6.6 – 8.8 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Ii ranges from −0.2 °C in February to 16.2 °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 March 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 14.2 and 17.8 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | −0.1° | −0.5° | 0.3° | cold |
| FebruaryFeb | −0.2° | −0.7° | 0.1° | cold |
| MarchMar | −0.1° | −0.5° | 0.2° | cold |
| AprilApr | 0.2° | −0.1° | 0.7° | cold |
| MayMay | 2.9° | 1.2° | 4.6° | cold |
| JuneJun | 10.8° | 7.5° | 14.6° | cold |
| JulyJul | 15.8° | 13.7° | 18.7° | cold |
| AugustAug | 16.2° | 14.2° | 17.8° | cold |
| SeptemberSep | 12.7° | 11.0° | 13.9° | cold |
| OctoberOct | 7.7° | 6.6° | 8.8° | cold |
| NovemberNov | 3.2° | 1.9° | 4.8° | cold |
| DecemberDec | 0.8° | −0.1° | 2.0° | cold |
Sunshine
Sunshine hours in Ii
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 2.3 of 9.8 hours of daylight in Ii, 23 % 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 in Ii: 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.
In October, Ii has about 11 rainy days with 62 mm of rain in total.
UV index
UV index in Ii
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 0 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 5).
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 and clouds in Ii
How breezy and how cloudy Ii 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.
In October, the wind in Ii typically peaks at 19 km/h during the day: Beaufort 3, gentle 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: Nov.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 77 % of the sky over Ii: mostly cloudy, with about 2.3 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 in Ii
When Ii 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 calendar
- hardly any
- possible
- likely
- very likely
In October, Ii has about 2 days with at least 1 cm of fresh snow, 7 cm in total. The chance of seeing snow during a week's stay is 24 out of 100: possible.
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 Ii
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Ii 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.
Ii has its best school-holiday weather during May half-term (score 30) and its weakest during October half-term (score 9).
- 26
Easter holidays
Mar – Apr
Poor
- 4 °C by day
- Sea 0 °C
- 6.3 h of sun a day
- 8 rainy days a month
Keep in mind: Snow
- 30
May half-term
May – Jun
PoorBest holidays
- 13 °C by day
- Sea 4 °C
- 8.6 h of sun a day
- 10 rainy days a month
- 29
Summer holidays
Jul – Aug
Poor
- 20 °C by day
- Sea 16 °C
- 7.7 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 9
October half-term
Oct
Poor
- 6 °C by day
- Sea 8 °C
- 2.3 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 11
Christmas holidays
Dec – Jan
Poor
- −4 °C by day
- Sea 0 °C
- 0.3 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 3 h 5 min
- Distance
- 2,120 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: Finland
- Currency
- Euro (EUR)
- Languages
- Finnish, Swedish
- Sockets
- Type C, F · 230 V
- Traffic
- Drives on the right
- Dialling code
- +358
- 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
Ii compared
Put Ii side by side with another destination.
Ii vs Oulu
In October the holiday weather in Ii and Oulu is about equally good (score 9 vs 10). During the day it is about as warm in Oulu as in Ii. The sea is about equally warm.
| in October | Ii | Oulu |
|---|---|---|
| Holiday weather score | 9 | 10 |
| Daytime high | 6° | 6° |
| Sea | 8° | 8° |
| Sunshine | 2 h | 2 h |
| Rainy days | 11 | 11 |
| Best time | Jul | Jun – Aug |
Through the year
Best places in the country
Finland in October: the best places
In October, Ii ranks 29 among the 31 nearest destinations in this country.
- Rovaniemi4°16
- 2Kokkola7°9°16
- 3Seinäjoki7°16
- 4Oulu6°8°15
- 5Hailuoto6°8°15
- 6Kemijärvi4°15
- 7Jakobstad7°9°15
- 8Sodankylä3°15
- 29IiThis page6°8°9
Places nearby
Near Ii
Other destinations close by.
Places with a similar climate
Places with a climate like Ii
Destinations whose weather through the year is closest to Ii's – good alternatives.
Frequently asked questions about Ii
When is the best time to visit Ii?
The best time to visit Ii is in July. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Ii?
The sea temperature in Ii ranges from −0.2 °C in February to 16.2 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Ii in October?
Only if you don't mind cold water: in October the sea averages just 7.7 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Ii?
July is the warmest month, with average highs of 21 °C and nights around 12 °C. January is the coolest month at −5 °C.
When does it rain most in Ii?
Rain is frequent in August; the wettest month is July with 82 mm. The driest month is March with 32 mm.
How many hours of sunshine does Ii get?
Ii gets around 1,710 hours of sunshine a year. The sunniest month is June with 9.5 hours a day; in December there is practically no direct sun.
What time zone is Ii in?
Ii is on UTC+2 in January and UTC+3 in July.
How long is the flight from London to Ii?
A nonstop flight from London to Ii takes about 3 h 5 min, for a straight-line distance of about 2,120 km.
Which school holidays are best for Ii?
Ii has its best school-holiday weather during May half-term (score 30) and its weakest during October half-term (score 9). Holiday ratings (0–100): Easter holidays 26, May half-term 30, summer holidays 29, October half-term 9, Christmas holidays 11.