Paris weather by month
Paris runs from about 4°C in January to 21°C in August, with August the wettest month at 135 mm.
warmest month
August
21°C
coolest month
January
4°C
wettest month
August
135 mm
worst air month
March
16 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 4°C | 65 mm | 130 h | 12 |
| February | 9°C | 105 mm | 78 h | 8 |
| March | 9°C | 106 mm | 207 h | 16 |
| April | 11°C | 88 mm | 278 h | 11 |
| May | 15°C | 125 mm | 305 h | 9 |
| June | 17°C | 105 mm | 332 h | 8 |
| July | 20°C | 63 mm | 335 h | 6 |
| August | 21°C | 135 mm | 318 h | 7 |
| September | 16°C | 128 mm | 225 h | 7 |
| October | 13°C | 118 mm | 160 h | 9 |
| November | 8°C | 58 mm | 105 h | 10 |
| December | 6°C | 56 mm | 69 h | 15 |
About 2,542 hours of sun a year. Roughly 119 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.