Santorini, Greece Climate & Monthly Averages
Santorini has a semi-arid climate. July is the hottest month, averaging 85° by day; January is the coldest at 58°.
Santorini's climate runs on sunshine and sparse rain
Santorini works on a dry budget: 10.9 inches (278 mm) of precipitation a year, spread over roughly 51 days. Temperature does the varying instead, from 58°F (14°C) on a typical January afternoon to 85°F (29°C) in July, with nights 4°C below the day.
What the dry climate changes
January is the wettest month at 2.2 inches (57 mm) over 11 days; July is the driest. January sits at the other end of the year: 58°F (14°C) by day, 52°F (11°C) at night. July is the warm end of the year, averaging 85°F (29°C) by day and 76°F (24°C) overnight. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 97°F (36°C) and the lowest daily minimum 37°F (3°C).
Days and nights are about 4°C apart on average - narrower than almost anywhere else we cover.
7 months average under 20 mm of rain, the longest unbroken stretch running April through October. June is the brightest month at 13.8 hours of sun a day, against an annual average of 10.9 - sunnier than 93% of the 3496 cities in our dataset.
More climate facts for Santorini
- Hottest month: July - highs near 85°F (29°C)
- Coldest month: January - highs near 58°F (14°C)
- Decade extremes (2015-2024): 97°F (36°C) high · 37°F (3°C) low
- Wettest month: January (11 rainy days) · Sunniest: June (13.8 h sun/day)
- Climate type: semi-arid
- Annual swing: 14°C between the average warmest and coolest month · day to night: 4°C
- Average humidity: 67%
Heat, cold and scarce precipitation in the dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
When the dry weather is easiest to use
Avoiding the hardest heat or cold
The best time to visit Santorini is generally February to June and September, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 70°F (21°C), with rain on about 4 days a month. For the same question asked the other way round, see where else is warm in February.
Prepare for sun and cooler nights
Pack for Santorini with light clothing for the warm months and rain gear if you travel around January. Note the gap between afternoon and night: July pairs 85°F (29°C) with 76°F (24°C).
Monthly heat and rainfall table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 58° | 52° | 11 | 2.2 in | 7.9 h/day | 9.9 h | 35% | 67% |
| February | 60° | 53° | 8 | 2.1 in | 9.1 h/day | 10.8 h | 28% | 69% |
| March | 61° | 55° | 7 | 1.9 in | 10.1 h/day | 11.9 h | 23% | 67% |
| April | 67° | 58° | 3 | 0.5 in | 11.5 h/day | 13.1 h | 11% | 67% |
| May | 73° | 64° | 3 | 0.4 in | 12.6 h/day | 14.1 h | 9% | 68% |
| June | 81° | 71° | 1 | 0.2 in | 13.8 h/day | 14.6 h | 5% | 66% |
| July | 85° | 76° | 0 | 0.0 in | 13.5 h/day | 14.4 h | 1% | 63% |
| August | 84° | 76° | 1 | 0.1 in | 12.9 h/day | 13.5 h | 2% | 66% |
| September | 80° | 73° | 1 | 0.2 in | 11.8 h/day | 12.4 h | 4% | 67% |
| October | 74° | 67° | 2 | 0.5 in | 10.1 h/day | 11.2 h | 8% | 69% |
| November | 68° | 61° | 4 | 0.9 in | 9.2 h/day | 10.2 h | 14% | 70% |
| December | 61° | 55° | 9 | 1.8 in | 8.1 h/day | 9.7 h | 28% | 69% |
How daytime heat and cool nights change by month
Each card shows the average high and low. The bar places that month between Santorini's coldest night and warmest afternoon.
January
- Rain
- 11 days
- Sunshine
- 7.9 h
- Daylight
- 9.9 h
February
- Rain
- 8 days
- Sunshine
- 9.1 h
- Daylight
- 10.8 h
March
- Rain
- 7 days
- Sunshine
- 10.1 h
- Daylight
- 11.9 h
April
- Rain
- 3 days
- Sunshine
- 11.5 h
- Daylight
- 13.1 h
May
- Rain
- 3 days
- Sunshine
- 12.6 h
- Daylight
- 14.1 h
June
- Rain
- 1 day
- Sunshine
- 13.8 h
- Daylight
- 14.6 h
July
- Rain
- 0 days
- Sunshine
- 13.5 h
- Daylight
- 14.4 h
August
- Rain
- 1 day
- Sunshine
- 12.9 h
- Daylight
- 13.5 h
September
- Rain
- 1 day
- Sunshine
- 11.8 h
- Daylight
- 12.4 h
October
- Rain
- 2 days
- Sunshine
- 10.1 h
- Daylight
- 11.2 h
November
- Rain
- 4 days
- Sunshine
- 9.2 h
- Daylight
- 10.2 h
December
- Rain
- 9 days
- Sunshine
- 8.1 h
- Daylight
- 9.7 h
Looking for warmer alternatives? Browse warm places by month, or compare Santorini's coolest part of the year: January, February, December.
Heat and cold across the Santorini year
Spring (March through May)
Spring in Santorini runs cool rather than cold, with daytime highs averaging 67°F (20°C) and nights around 59°F (15°C); rain comes on about 13 days over the three months. Daylight is generous - around 11.4 hours of sun a day.
Summer (June through August)
Through summer, Santorini is hot: 83°F (28°C) by day, 74°F (24°C) after dark, and precipitation is sparse, near 8 mm (0.3 in) for the season. Daylight is generous - around 13.4 hours of sun a day.
Fall (September through November)
Through fall, Santorini is mild and warm: 74°F (23°C) by day, 67°F (19°C) after dark, and precipitation is sparse, near 1.7 inches (42 mm) for the season. Daylight is generous - around 10.4 hours of sun a day.
Winter (December through February)
Through winter, Santorini is crisp but comfortable: 60°F (15°C) by day, 53°F (12°C) after dark, and expect showers on roughly 27 days across the season.
How unusual is Santorini?
- Annual precipitation is 10.9 inches (278 mm) - drier than all but 7% of the 3496 cities we track.
- Rain or snow reaches the ground on 51 days a year - fewer wet days than all but 9% of the 3496 cities we track.
These comparisons use the same ten-year window for every city in the dataset.