Athens weather by month
Athens runs from about 10°C in January to 30°C in July, with December the wettest month at 153 mm.
warmest month
July
30°C
coolest month
January
10°C
wettest month
December
153 mm
worst air month
December
19 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 10°C | 34 mm | 213 h | 12 |
| February | 12°C | 49 mm | 244 h | 12 |
| March | 13°C | 58 mm | 309 h | 15 |
| April | 19°C | 19 mm | 346 h | 14 |
| May | 20°C | 10 mm | 362 h | 10 |
| June | 29°C | 3 mm | 418 h | 9 |
| July | 30°C | 31 mm | 421 h | 11 |
| August | 29°C | 32 mm | 397 h | 10 |
| September | 24°C | 24 mm | 347 h | 10 |
| October | 20°C | 5 mm | 312 h | 9 |
| November | 14°C | 69 mm | 240 h | 11 |
| December | 11°C | 153 mm | 230 h | 19 |
About 3,839 hours of sun a year. Roughly 48 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.