Marseille weather by month
Marseille runs from about 9°C in December to 25°C in August, with March the wettest month at 151 mm.
warmest month
August
25°C
coolest month
December
9°C
wettest month
March
151 mm
worst air month
August
9 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 9°C | 42 mm | 220 h | 6 |
| February | 11°C | 80 mm | 242 h | 6 |
| March | 12°C | 151 mm | 285 h | 9 |
| April | 14°C | 35 mm | 342 h | 8 |
| May | 17°C | 52 mm | 367 h | 6 |
| June | 21°C | 44 mm | 401 h | 8 |
| July | 24°C | 7 mm | 427 h | 6 |
| August | 25°C | 20 mm | 400 h | 9 |
| September | 20°C | 85 mm | 313 h | 5 |
| October | 18°C | 74 mm | 270 h | 8 |
| November | 13°C | 58 mm | 229 h | 6 |
| December | 9°C | 14 mm | 242 h | 8 |
About 3,738 hours of sun a year. Roughly 66 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.