Utrecht weather by month
Utrecht runs from about 4°C in January to 19°C in August, with May the wettest month at 147 mm.
warmest month
August
19°C
coolest month
January
4°C
wettest month
May
147 mm
worst air month
March
16 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 4°C | 73 mm | 113 h | 15 |
| February | 8°C | 126 mm | 91 h | 11 |
| March | 9°C | 56 mm | 190 h | 16 |
| April | 10°C | 93 mm | 267 h | 10 |
| May | 15°C | 147 mm | 325 h | 9 |
| June | 16°C | 63 mm | 333 h | 8 |
| July | 18°C | 86 mm | 328 h | 7 |
| August | 19°C | 83 mm | 339 h | 9 |
| September | 16°C | 99 mm | 277 h | 8 |
| October | 12°C | 49 mm | 179 h | 8 |
| November | 7°C | 89 mm | 110 h | 10 |
| December | 6°C | 82 mm | 65 h | 11 |
About 2,617 hours of sun a year. Roughly 105 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.