Santorini weather by month
Santorini runs from about 14°C in January to 28°C in July, with February the wettest month at 71 mm.
warmest month
July
28°C
coolest month
January
14°C
wettest month
February
71 mm
worst air month
July
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 14°C | 48 mm | 228 h | 5 |
| February | 15°C | 71 mm | 250 h | 7 |
| March | 16°C | 23 mm | 319 h | 8 |
| April | 19°C | 11 mm | 349 h | 9 |
| May | 21°C | 13 mm | 375 h | 8 |
| June | 27°C | 0 mm | 414 h | 9 |
| July | 28°C | 1 mm | 418 h | 10 |
| August | 28°C | 0 mm | 400 h | 10 |
| September | 26°C | 2 mm | 353 h | 9 |
| October | 22°C | 1 mm | 320 h | 5 |
| November | 17°C | 13 mm | 285 h | 7 |
| December | 15°C | 68 mm | 259 h | 6 |
About 3,970 hours of sun a year. Roughly 24 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.