Rovaniemi weather by month
Rovaniemi runs from about -12°C in January to 17°C in July, with July the wettest month at 121 mm.
warmest month
July
17°C
coolest month
January
-12°C
wettest month
July
121 mm
worst air month
January
4 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -12°C | 36 mm | 19 h | 4 |
| February | -8°C | 39 mm | 44 h | 4 |
| March | -4°C | 42 mm | 138 h | 3 |
| April | -2°C | 50 mm | 183 h | 2 |
| May | 8°C | 24 mm | 427 h | 2 |
| June | 16°C | 79 mm | 439 h | 2 |
| July | 17°C | 121 mm | 372 h | 3 |
| August | 16°C | 77 mm | 329 h | 3 |
| September | 11°C | 58 mm | 203 h | 3 |
| October | 3°C | 64 mm | 124 h | 2 |
| November | -3°C | 47 mm | 38 h | 2 |
| December | -7°C | 36 mm | 5 h | 2 |
About 2,321 hours of sun a year. Roughly 68 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.