Turku
September
Weather in Turku for September 2026
Your guide to Turku weather in September - trends and predictions
Until now, September 2026 in Turku is cooler than usual, with temperatures averaging 16.8 °C, this is 2.2 °C below the typical seasonal average.
Expect cooler weather in the next days in Turku with the forecast suggesting a temperature of 14.8 °C, lower than the historical average.
In general, the average temperature in Turku at the beginning of September is 18.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °C by the end of September.
Turku in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 84.9 mm.
Temperatures
Rain 🌧️
11
Dry days
19
Rainy days
0
Snow days
17°/11°
Temperatures
20 km/h
Avg max wind
80 %
Avg humidity
Turku Weather September
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Temperatures trend during September in Turku
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September weather in Turku day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 18° /11° | 8.6 mm | 4 | |
| 2 Sept. | Light rain shower | 17° /10° | 2.6 mm | 3 | |
| 3 Sept. |  Cloudy | 17° /12° | 1.2 mm | 4 | |
| 4 Sept. |  Sunny | 20° /12° | 0 mm | 4 | |
| 5 Sept. |  Overcast | 20° /12° | 0.1 mm | 4 | |
| 6 Sept. | Sunny | 20° /11° | 0.2 mm | 5 | |
| 7 Sept. | Sunny | 19° /11° | 1 mm | 4 | |
| 8 Sept. |  Mist | 20° /14° | 1.7 mm | 4 | |
| 9 Sept. |  Partly cloudy | 20° /14° | 6.2 mm | 4 | |
| 10 Sept. | Overcast | 19° /13° | 3.4 mm | 4 | |
| 11 Sept. | Patchy rain possible | 19° /12° | 1.5 mm | 4 | |
| 12 Sept. | Overcast | 17° /12° | 3.4 mm | 3 | |
| 13 Sept. | Patchy rain possible | 16° /8° | 1.5 mm | 1.1 | |
| 14 Sept. | Sunny | 16° /7° | 0 mm | 2.3 | |
| 15 Sept. | Overcast | 15° /7° | 0 mm | 2 | |
| 16 Sept. | Overcast | 16° /12° | 2 mm | 2.1 | |
| 17 Sept. | Patchy rain possible | 15° /12° | 2.8 mm | 3 | |
| 18 Sept. | Patchy rain possible | 15° /12° | 2.3 mm | 4 | |
| 19 Sept. | Sunny | 15° /12° | 0.2 mm | 4 | |
| 20 Sept. | Patchy rain possible | 15° /13° | 2.1 mm | 3 | |
| 21 Sept. | Patchy rain possible | 14° /12° | 1.9 mm | 4 | |
| 22 Sept. | Patchy rain possible | 14° /10° | 6 mm | 4 | |
| 23 Sept. | Patchy rain possible | 13° /9° | 7.5 mm | 3 | |
| 24 Sept. | Patchy rain possible | 12° /10° | 7.7 mm | 3 | |
| 25 Sept. | Overcast | 13° /9° | 1.8 mm | 3 | |
| 26 Sept. | Sunny | 18° /10° | 0 mm | 5 | |
| 27 Sept. | Light rain shower | 16° /11° | 8.2 mm | 4 | |
| 28 Sept. | Overcast | 14° /8° | 3 mm | 4 | |
| 29 Sept. | Mist | 12° /8° | 0.5 mm | 4 | |
| 30 Sept. | Light rain shower | 12° /6° | 1.7 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 84.9 mm spread over approximately 19 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 20 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 💧
Typically, Turku has 19 rainy days in September with a total of 84.9 mm of rainfall.
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