Colmar weather by month
Colmar runs from about 3°C in January to 21°C in August, with May the wettest month at 163 mm.
warmest month
August
21°C
coolest month
January
3°C
wettest month
May
163 mm
worst air month
January
21 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 3°C | 103 mm | 126 h | 21 |
| February | 8°C | 111 mm | 148 h | 13 |
| March | 9°C | 69 mm | 235 h | 17 |
| April | 11°C | 87 mm | 272 h | 11 |
| May | 15°C | 163 mm | 308 h | 7 |
| June | 18°C | 138 mm | 327 h | 7 |
| July | 20°C | 124 mm | 375 h | 5 |
| August | 21°C | 68 mm | 376 h | 8 |
| September | 16°C | 120 mm | 246 h | 6 |
| October | 13°C | 104 mm | 184 h | 10 |
| November | 6°C | 120 mm | 171 h | 15 |
| December | 3°C | 93 mm | 145 h | 21 |
About 2,913 hours of sun a year. Roughly 129 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.