- Oulu ›
- Weather by month
Oulu Weather by Month
Average temperatures, rainfall and humidity for Oulu, Finland, month by month, built from OpenWeather’s historical records. Use it to see what a typical Oulu month looks like before you travel — then check the live Oulu forecast for the days ahead.
Warmest month
July
21°C average high
Coolest month
January
-12°C average low
Wettest month
July
73 mm of rain
Driest month
January
11 mm of rain
Average temperature and rainfall in Oulu by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | -5°C | -12°C | -32°C / 7°C | 11 mm | 87% | 13 km/h |
| February | -4°C | -10°C | -31°C / 6°C | 11 mm | 86% | 13 km/h |
| March | 0°C | -7°C | -28°C / 11°C | 17 mm | 80% | 14 km/h |
| April | 6°C | -3°C | -19°C / 18°C | 27 mm | 72% | 13 km/h |
| May | 13°C | 4°C | -6°C / 28°C | 58 mm | 66% | 14 km/h |
| June | 18°C | 9°C | 1°C / 31°C | 60 mm | 68% | 14 km/h |
| July | 21°C | 12°C | 5°C / 32°C | 73 mm | 73% | 11 km/h |
| August | 19°C | 11°C | 2°C / 31°C | 72 mm | 79% | 12 km/h |
| September | 14°C | 7°C | -4°C / 25°C | 54 mm | 84% | 13 km/h |
| October | 6°C | 1°C | -12°C / 21°C | 61 mm | 89% | 13 km/h |
| November | 1°C | -3°C | -18°C / 11°C | 37 mm | 90% | 13 km/h |
| December | -2°C | -7°C | -25°C / 8°C | 23 mm | 88% | 14 km/h |
Best time to visit Oulu
The most comfortable time to visit Oulu is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 504 mm a year.
Travellers who prefer heat should aim for July, when highs average 21°C. July is the month to avoid if rain would spoil your plans — it averages 73 mm, roughly 7× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Oulu forecast for what is happening now.