Sofia weather by month
Sofia runs from about 1°C in January to 25°C in July, with December the wettest month at 90 mm.
warmest month
July
25°C
coolest month
January
1°C
wettest month
December
90 mm
worst air month
December
32 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 1°C | 41 mm | 211 h | 27 |
| February | 6°C | 17 mm | 240 h | 23 |
| March | 8°C | 54 mm | 275 h | 22 |
| April | 14°C | 61 mm | 326 h | 15 |
| May | 15°C | 75 mm | 322 h | 9 |
| June | 23°C | 34 mm | 421 h | 9 |
| July | 25°C | 6 mm | 447 h | 9 |
| August | 24°C | 10 mm | 398 h | 9 |
| September | 18°C | 28 mm | 296 h | 10 |
| October | 13°C | 29 mm | 305 h | 11 |
| November | 4°C | 58 mm | 198 h | 19 |
| December | 2°C | 90 mm | 155 h | 32 |
About 3,594 hours of sun a year. Roughly 51 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 2026-05-22. Full method, licences and the list of sources we rejected are on the methodology page.