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Turku Weather by Month
Average temperatures, rainfall and humidity for Turku, Finland, month by month, built from OpenWeather’s historical records. Use it to see what a typical Turku month looks like before you travel — then check the live Turku forecast for the days ahead.
Warmest month
July
22°C average high
Coolest month
January
-6°C average low
Wettest month
August
72 mm of rain
Driest month
January
27 mm of rain
Average temperature and rainfall in Turku 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 | -1°C | -6°C | -28°C / 8°C | 27 mm | 90% | 12 km/h |
| February | 0°C | -5°C | -25°C / 9°C | 34 mm | 88% | 12 km/h |
| March | 4°C | -4°C | -24°C / 13°C | 32 mm | 80% | 12 km/h |
| April | 9°C | -1°C | -12°C / 21°C | 34 mm | 69% | 12 km/h |
| May | 15°C | 4°C | -6°C / 29°C | 48 mm | 64% | 12 km/h |
| June | 20°C | 10°C | 0°C / 31°C | 46 mm | 67% | 12 km/h |
| July | 22°C | 12°C | 3°C / 33°C | 52 mm | 72% | 11 km/h |
| August | 20°C | 11°C | 3°C / 32°C | 72 mm | 77% | 11 km/h |
| September | 16°C | 8°C | -3°C / 28°C | 54 mm | 82% | 11 km/h |
| October | 9°C | 3°C | -8°C / 17°C | 64 mm | 87% | 12 km/h |
| November | 5°C | 0°C | -15°C / 14°C | 59 mm | 90% | 12 km/h |
| December | 2°C | -3°C | -22°C / 10°C | 50 mm | 90% | 13 km/h |
Best time to visit Turku
The most comfortable time to visit Turku 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 August, totalling about 571 mm a year.
Travellers who prefer heat should aim for July, when highs average 22°C. August is the month to avoid if rain would spoil your plans — it averages 72 mm, roughly 3× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Turku forecast for what is happening now.