Warsaw weather by month
Warsaw runs from about 0°C in January to 22°C in July, with August the wettest month at 84 mm.
warmest month
July
22°C
coolest month
January
0°C
wettest month
August
84 mm
worst air month
January
44 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 0°C | 68 mm | 85 h | 44 |
| February | 6°C | 83 mm | 78 h | 32 |
| March | 6°C | 37 mm | 212 h | 36 |
| April | 11°C | 50 mm | 262 h | 12 |
| May | 18°C | 16 mm | 401 h | 10 |
| June | 20°C | 72 mm | 354 h | 9 |
| July | 22°C | 68 mm | 381 h | 8 |
| August | 21°C | 84 mm | 325 h | 9 |
| September | 18°C | 44 mm | 296 h | 12 |
| October | 10°C | 41 mm | 173 h | 18 |
| November | 4°C | 32 mm | 97 h | 37 |
| December | 3°C | 36 mm | 51 h | 39 |
About 2,715 hours of sun a year. Roughly 63 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.