Thessaloniki weather by month
Thessaloniki runs from about 6°C in January to 29°C in July, with December the wettest month at 191 mm.
warmest month
July
29°C
coolest month
January
6°C
wettest month
December
191 mm
worst air month
December
21 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 6°C | 57 mm | 229 h | 15 |
| February | 10°C | 24 mm | 254 h | 12 |
| March | 11°C | 79 mm | 286 h | 18 |
| April | 16°C | 58 mm | 346 h | 15 |
| May | 18°C | 48 mm | 362 h | 11 |
| June | 27°C | 14 mm | 422 h | 10 |
| July | 29°C | 13 mm | 425 h | 10 |
| August | 27°C | 30 mm | 397 h | 9 |
| September | 22°C | 48 mm | 324 h | 9 |
| October | 17°C | 3 mm | 296 h | 9 |
| November | 10°C | 80 mm | 209 h | 14 |
| December | 7°C | 191 mm | 176 h | 21 |
About 3,726 hours of sun a year. Roughly 64 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.