AI-generatedIos at a glance
- Best time
- Jul – Sep
- Warmest month
- Aug · 26°
- Warmest sea
- Aug · 24.3°
- Sunshine a year
- 2,880 h
- Rain a year
- 338 mm
- Climate
- Mediterranean
- Time zone
- UTC+2 / UTC+3
- Elevation
- 140 m
Climate in Ios
Ios has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. August is the warmest month with average highs of 26 °C, while January is the coolest at 13 °C. With around 2,880 hours of sunshine a year, Ios is sunny; June is the sunniest month with 11.5 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: July – September
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 19°
- Midday, 13:00: about 20°
- Afternoon, 16:00: about 21°
- Evening, 20:00: about 20°
- Night, 23:00: about 19°
07:2518:44
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:09–08:00 · evening 18:09–19:00
- Blue hour
- Morning 06:59–07:09 · evening 19:00–19:10
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.
What is the weather like in Ios in October?
In October, Ios is mild: daytime highs average 21 °C, and nights cool down to about 18 °C. The sea averages 21.9 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 23 mm in total. It is often windy, with gusts of around 32 km/h. All in all, October is a good month for a holiday in Ios.
More details for October
- Daylight
- 11 h 19 min07:25 – 18:44
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 32 km/haverage daily peakAll months
- Cloud cover
- 29 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %27 %
- Seaweight 25 %70 %
- Sunshineweight 20 %73 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Windproof jacket
Sea temperature in Ios
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 20.8 – 22.9 °C
Swimming season: Jun – Oct
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Ios ranges from 16.3 °C in February to 24.3 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
From October to April 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 23.3 and 25.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 16.7° | 15.8° | 17.9° | cold |
| FebruaryFeb | 16.3° | 15.5° | 16.9° | cold |
| MarchMar | 16.4° | 15.8° | 17.0° | cold |
| AprilApr | 16.9° | 16.3° | 17.6° | cold |
| MayMay | 18.9° | 18.1° | 19.5° | fresh |
| JuneJun | 21.9° | 21.3° | 22.7° | refreshing |
| JulyJul | 23.5° | 22.6° | 24.2° | pleasant |
| AugustAug | 24.3° | 23.3° | 25.4° | pleasant |
| SeptemberSep | 23.8° | 22.6° | 24.8° | pleasant |
| OctoberOct | 21.9° | 20.8° | 22.9° | refreshing |
| NovemberNov | 19.6° | 18.3° | 20.6° | fresh |
| DecemberDec | 17.7° | 16.9° | 18.6° | fresh |
Sunshine hours in Ios
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 7.4 of 11.3 hours of daylight in Ios, 65 % of the day.
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.
UV index in Ios
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 30 min
- Fair skin
- about 35 min
- Light brown skin
- about 50 min
- Olive skin
- about 60 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, 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.
Rain in Ios: 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, Ios has about 4 rainy days with 23 mm of rain in total.
Wind and clouds in Ios
How breezy and how cloudy Ios 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 Ios typically peaks at 32 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 gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 29 % of the sky over Ios: mostly sunny, with about 7.4 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.
Heat and humidity in Ios
How often the day gets hot in Ios (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Ios has about 0 hot days, with an average daytime high of 21 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Ios
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
PleasantOctober: nights around 18°. Ideal for sleeping, often with the window open. Muggy on about 5 days (dew point 18 °C or more).
The coolest nights are in January (11°), the warmest in August (24°). Tropical nights of 20 °C and more are the rule from June to September; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in May and from October to November. It is muggy (dew point 18 °C or more) on about 92 days a year, mostly from June to September.
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 | 14 | 13° | 11° | 16.7° | 4.4 h | 11 | 75 |
| FebruaryFeb | 19 | 13° | 11° | 16.3° | 5.1 h | 10 | 62 |
| MarchMar | 28 | 14° | 12° | 16.4° | 6.7 h | 7 | 42 |
| AprilApr | 39 | 17° | 14° | 16.9° | 8.6 h | 3 | 16 |
| MayMay | 51 | 20° | 17° | 18.9° | 9.6 h | 2 | 8 |
| JuneJun | 84 | 24° | 21° | 21.9° | 11.5 h | 0 | 1 |
| JulyJul | 98 | 26° | 23° | 23.5° | 11.4 h | 0 | 0 |
| AugustAug | 100 | 26° | 24° | 24.3° | 10.8 h | 0 | 1 |
| SeptemberSep | 92 | 24° | 22° | 23.8° | 9.4 h | 1 | 5 |
| OctoberOct | 62 | 21° | 18° | 21.9° | 7.4 h | 4 | 23 |
| NovemberNov | 35 | 18° | 15° | 19.6° | 5.6 h | 6 | 38 |
| DecemberDec | 17 | 15° | 13° | 17.7° | 4.0 h | 10 | 66 |
Climate averages 1996–2025, 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
36.72° N, 25.28° E · 140 m · Europe/Athens
Best time to visit Ios
The best time to visit Ios is from July to September. For a beach holiday with the sea above 21 °C, go from June to September. For sightseeing, day trips and hiking, conditions are most comfortable from April to November. The wettest month is January with 75 mm of precipitation.
Ios through the seasons
How the weather changes over the seasons, with averages for each.
Ios in spring
Mar – May
Poor
- 14–20 °C by day
- Sea 17 °C
- 8 h of sun a day
- 12 rainy days in all
Ios in summer
Jun – Aug
Excellent
- 24–26 °C by day
- Sea 23 °C
- 11 h of sun a day
- 1 rainy days in all
Ios in autumn
Sep – Nov
Good
- 18–24 °C by day
- Sea 22 °C
- 8 h of sun a day
- 11 rainy days in all
Ios in winter
Dec – Feb
Poor
- 13–15 °C by day
- Sea 17 °C
- 5 h of sun a day
- 31 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Ios for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Compare two months in Ios
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Ios: score 100 against 62. In August, days are 5 °C warmer than in October. The sea is 2 °C warmer in August. August has 4 fewer rainy days. The sun shines 3 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Weather score | 62 | 100better |
| Day high | 21° | 26° |
| Night low | 18° | 24° |
| Sea | 21.9° | 24.3° |
| Sunshine | 7.4 h | 10.8 hbetter |
| Rainy days | 4 | 0better |
| Rainfall | 23 mm | 1 mmbetter |
| Muggy days | 5better | 28 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jun – Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Nov
15–28 °C and not too much rain
Ios month by month
The typical weather for every month at a glance.
14January13° · Sea 17° · 4 h
In January, Ios is cool: daytime highs average 13 °C, and nights cool down to about 11 °C. The sea averages 16.7 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 75 mm in total. It is often windy, with gusts of around 37 km/h. All in all, January is not an ideal month for a holiday in Ios.
Ios in January19February13° · Sea 16° · 5 h
In February, Ios is cool: daytime highs average 13 °C, and nights cool down to about 11 °C. The sea averages 16.3 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 62 mm in total. It is often windy, with gusts of around 38 km/h. All in all, February is not an ideal month for a holiday in Ios.
Ios in February28March14° · Sea 16° · 7 h
In March, Ios is cool: daytime highs average 14 °C, and nights cool down to about 12 °C. The sea averages 16.4 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain falls on about 7 days, adding up to 42 mm. It is often windy, with gusts of around 36 km/h. All in all, March is not an ideal month for a holiday in Ios.
Ios in March39April17° · Sea 17° · 9 h
In April, Ios is mild: daytime highs average 17 °C, and nights cool down to about 14 °C. The sea averages 16.9 °C – swimming is only for the hardy. The sun shines for around 9 hours a day. Rain is rare: about 3 days bring 16 mm in total. It is often windy, with gusts of around 32 km/h. All in all, April is not an ideal month for a holiday in Ios.
Ios in April51May20° · Sea 19° · 10 h
In May, Ios is mild: daytime highs average 20 °C, and nights cool down to about 17 °C. The sea averages 18.9 °C – bracing, so a wetsuit helps for longer swims. With around 10 hours of sunshine a day, there is plenty of sun. It hardly ever rains. It is often windy, with gusts of around 29 km/h. All in all, May is a so-so month for a holiday in Ios.
Ios in May84June24° · Sea 22° · 12 h
In June, Ios is warm: daytime highs average 24 °C, and even at night it stays warm at around 21 °C. The sea averages 21.9 °C – refreshing for a swim. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. It is often windy, with gusts of around 29 km/h. All in all, June is an excellent month for a holiday in Ios.
Ios in June98July26° · Sea 24° · 11 h
In July, Ios is warm: daytime highs average 26 °C, and even at night it stays warm at around 23 °C. The sea averages 23.5 °C – pleasant for swimming. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. It is often windy, with gusts of around 32 km/h. All in all, July is an excellent month for a holiday in Ios.
Ios in July100August26° · Sea 24° · 11 h
In August, Ios is warm: daytime highs average 26 °C, and even at night it stays warm at around 24 °C. The sea averages 24.3 °C – pleasant for swimming. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. It is often windy, with gusts of around 32 km/h. All in all, August is an excellent month for a holiday in Ios.
Ios in August92September24° · Sea 24° · 9 h
In September, Ios is warm: daytime highs average 24 °C, and even at night it stays warm at around 22 °C. The sea averages 23.8 °C – pleasant for swimming. With around 9 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. It is often windy, with gusts of around 31 km/h. All in all, September is an excellent month for a holiday in Ios.
Ios in September62October21° · Sea 22° · 7 h
In October, Ios is mild: daytime highs average 21 °C, and nights cool down to about 18 °C. The sea averages 21.9 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 23 mm in total. It is often windy, with gusts of around 32 km/h. All in all, October is a good month for a holiday in Ios.
Ios in October35November18° · Sea 20° · 6 h
In November, Ios is mild: daytime highs average 18 °C, and nights cool down to about 15 °C. The sea averages 19.6 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain falls on about 6 days, adding up to 38 mm. It is often windy, with gusts of around 32 km/h. All in all, November is not an ideal month for a holiday in Ios.
Ios in November17December15° · Sea 18° · 4 h
In December, Ios is cool: daytime highs average 15 °C, and nights cool down to about 13 °C. The sea averages 17.7 °C – bracing, so a wetsuit helps for longer swims. Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 66 mm in total. It is often windy, with gusts of around 36 km/h. All in all, December is not an ideal month for a holiday in Ios.
Ios in DecemberIos compared
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Ios vs. Oia
In October the holiday weather in Ios and Oia is about equally good (score 62 vs. 66). During the day it is about as warm in Oia as in Ios. The sea is about equally warm.
| in October | Ios | Oia |
|---|---|---|
| Holiday score | 62 | 66 |
| Daytime high | 21° | 21° |
| Sea | 22° | 22° |
| Sunshine | 7 h | 7 h |
| Rainy days | 4 | 3 |
| Best time | Jul – Sep | Jun – Sep |
Through the year
Greece in October: the best places
In October, Ios ranks 24 among the 31 nearest destinations in this country.
- Athens23°23°91
- 2Piraeus23°23°91
- 3Symi24°24°85
- 4Malia24°23°83
- 5Agios Nikolaos24°23°83
- 6Heraklion24°23°82
- 7Ierapetra23°24°81
- 8Rethymno24°23°78
- 24IosThis page21°22°62
Planning a trip to Ios
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Ios 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.
Ios has its best school-holiday weather during the summer holidays (score 99) and its weakest during the Christmas holidays (score 16).
- 36
Easter holidays
Mar – Apr
Poor
- 16 °C by day
- Sea 17 °C
- 8.0 h of sun a day
- 4 rainy days a month
- 58
May half-term
May – Jun
Fair
- 21 °C by day
- Sea 20 °C
- 10.0 h of sun a day
- 1 rainy day a month
Good for: Sightseeing & walks
- 99
Summer holidays
Jul – Aug
ExcellentBest holidays
- 26 °C by day
- Sea 24 °C
- 11.0 h of sun a day
- 0 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 62
October half-term
Oct
Good
- 21 °C by day
- Sea 22 °C
- 7.4 h of sun a day
- 4 rainy days a month
Good for: Sightseeing & walks
- 16
Christmas holidays
Dec – Jan
Poor
- 14 °C by day
- Sea 17 °C
- 4.2 h of sun a day
- 11 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 3 h 40 min
- Distance
- 2,610 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.
Frequently asked questions about Ios
When is the best time to visit Ios?
The best time to visit Ios is from July to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Ios?
The sea temperature in Ios ranges from 16.3 °C in February to 24.3 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
Can you swim in Ios in October?
Yes. In October the sea averages 21.9 °C – refreshing for a swim.
What is the warmest month in Ios?
August is the warmest month, with average highs of 26 °C and nights around 24 °C. January is the coolest month at 13 °C.
When does it rain most in Ios?
The wettest month is January with 75 mm of precipitation. The driest month is July with 0 mm.
How many hours of sunshine does Ios get?
Ios gets around 2,880 hours of sunshine a year. The sunniest month is June with 11.5 hours a day; in December there are 4.0 hours a day.
What time zone is Ios in?
Ios uses the time zone Europe/Athens: UTC+2 in January and UTC+3 in July.
How long is the flight from London to Ios?
A nonstop flight from London to Ios takes about 3 h 40 min, for a straight-line distance of about 2,610 km.
Which school holidays are best for Ios?
Ios has its best school-holiday weather during the summer holidays (score 99) and its weakest during the Christmas holidays (score 16). Holiday ratings (0–100): Easter holidays 36, May half-term 58, Summer holidays 99, October half-term 62, Christmas holidays 16.
Near Ios
Other destinations close by.
Places with a climate like Ios
Destinations whose weather through the year is closest to Ios's – good alternatives.