Prague weather by month
Prague runs from about 1°C in January to 22°C in August, with September the wettest month at 149 mm.
warmest month
August
22°C
coolest month
January
1°C
wettest month
September
149 mm
worst air month
December
25 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 1°C | 53 mm | 153 h | 24 |
| February | 7°C | 56 mm | 108 h | 21 |
| March | 8°C | 19 mm | 249 h | 21 |
| April | 12°C | 37 mm | 309 h | 12 |
| May | 16°C | 114 mm | 319 h | 8 |
| June | 20°C | 44 mm | 362 h | 7 |
| July | 22°C | 61 mm | 382 h | 5 |
| August | 22°C | 79 mm | 356 h | 7 |
| September | 17°C | 149 mm | 251 h | 7 |
| October | 11°C | 41 mm | 203 h | 8 |
| November | 4°C | 29 mm | 134 h | 17 |
| December | 2°C | 34 mm | 127 h | 25 |
About 2,953 hours of sun a year. Roughly 71 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.