Turku
September
Weather in Turku for September 2025
Your guide to Turku weather in September - trends and predictions
Wind Warning for Marine Areas - See hour by hour.
So far, September 2025 in Turku is slightly warmer than the historical average by 0.8 °C.
The forecast for the next days in Turku predicts a temperature of 14 °C, which is cooler than the historical average.
In general, the average temperature in Turku at the beginning of September is 19 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.1 °C by the end of September.
The climate of Turku in September is notably wet, with an average of 14 rainy days, and a total of 94.8 mm of precipitation.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
16
Dry days
14
Rainy days
0
Snow days
17°/11°
Temperatures
21 km/h
Avg max wind
80 %
Avg humidity
Turku Weather September
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Temperatures trend during September in Turku
See the weather trend as well as the moving average line
September weather in Turku day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 17° /11° | 10.9 mm | 4 | |
| 2 Sept. | Light rain shower | 17° /11° | 3.4 mm | 4 | |
| 3 Sept. |  Cloudy | 18° /12° | 0.9 mm | 4 | |
| 4 Sept. | Cloudy | 20° /13° | 0 mm | 5 | |
| 5 Sept. |  Overcast | 21° /13° | 0 mm | 5 | |
| 6 Sept. | Cloudy | 20° /12° | 0.2 mm | 5 | |
| 7 Sept. |  Partly cloudy | 20° /12° | 1.2 mm | 5 | |
| 8 Sept. |  Mist | 22° /14° | 0 mm | 6 | |
| 9 Sept. | Partly cloudy | 21° /15° | 0 mm | 5 | |
| 10 Sept. | Overcast | 20° /14° | 1.7 mm | 4 | |
| 11 Sept. | Mist | 20° /14° | 1.9 mm | 5 | |
| 12 Sept. | Overcast | 17° /13° | 3.9 mm | 4 | |
| 13 Sept. | Mist | 18° /11° | 0.6 mm | 4 | |
| 14 Sept. | Partly cloudy | 15° /10° | 12.6 mm | 4 | |
| 15 Sept. | Cloudy | 16° /7° | 0 mm | 5 | |
| 16 Sept. |  Moderate rain | 16° /13° | 11.6 mm | 0.6 | |
| 17 Sept. | Moderate rain | 15° /12° | 7.4 mm | 0.5 | |
| 18 Sept. | Patchy rain possible | 15° /12° | 1.9 mm | 0.5 | |
| 19 Sept. | Patchy rain possible | 15° /12° | 1.6 mm | 0.5 | |
| 20 Sept. | Patchy rain possible | 17° /12° | 0.5 mm | 0.6 | |
| 21 Sept. | Patchy rain possible | 14° /12° | 0.5 mm | 3 | |
| 22 Sept. | Patchy rain possible | 15° /10° | 1.3 mm | 3 | |
| 23 Sept. | Patchy rain possible | 10° /6° | 0.4 mm | 2 | |
| 24 Sept. |  Sunny | 13° /5° | 0 mm | 3 | |
| 25 Sept. | Sunny | 12° /4° | 0 mm | 3 | |
| 26 Sept. | Sunny | 13° /4° | 0 mm | 3 | |
| 27 Sept. | Sunny | 14° /6° | 0 mm | 3 | |
| 28 Sept. | Sunny | 14° /9° | 0 mm | 4 | |
| 29 Sept. | Sunny | 13° /11° | 0 mm | 4 | |
| 30 Sept. | Light rain shower | 13° /7° | 2.5 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Turku in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Turku forecast closer to your planned date for the most up-to-date weather information.
Change Month
Turku in September - FAQ
What are the expected maximum and minimum temperatures in Turku during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Turku during September?
Moderate rainfall is anticipated in Turku during September, with a total of 94.8 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Turku during September?
The average wind speed in Turku during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Turku
Explore the daily rainfall trends and prepare for Turkus September weather 💧
UV exposure in Turku during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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