Turku
September
Weather in Turku for September 2025
Your guide to Turku weather in September - trends and predictions
In general, the average temperature in Turku at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °C by the end of September.
With an average of 5 rainy days, Turku experiences minimal rainfall in September.
Temperatures
Rain 🌧️
25
Dry days
5
Rainy days
0
Snow days
18°/10°
Temperatures
21 km/h
Avg max wind
81 %
Avg humidity
Turku Weather September
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | 2 15° | 3  18° | 4 20° | 5  21° | 6 19° | 7  19° |
| 8  21° | 9 20° | 10 19° | 11 19° | 12 17° | 13 18° | 14 14° |
| 15 16° | 16 17° | 17 16° | 18 15° | 19 17° | 20 17° | 21 17° |
| 22 15° | 23  16° | 24 15° | 25 15° | 26 15° | 27 16° | 28 13° |
| 29 13° | 30 13° |
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Temperatures trend during September in Turku
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 16° /12° | 16.3 mm | 4 | |
| 2 Sept. | Light rain shower | 15° /10° | 5.1 mm | 4 | |
| 3 Sept. | Cloudy | 18° /11° | 0.1 mm | 5 | |
| 4 Sept. | Cloudy | 20° /13° | 0 mm | 5 | |
| 5 Sept. | Overcast | 21° /13° | 0 mm | 5 | |
| 6 Sept. | Cloudy | 19° /11° | 0 mm | 5 | |
| 7 Sept. | Partly cloudy | 19° /11° | 0 mm | 6 | |
| 8 Sept. | Mist | 21° /14° | 0 mm | 6 | |
| 9 Sept. | Partly cloudy | 20° /15° | 0 mm | 6 | |
| 10 Sept. | Overcast | 19° /14° | 2.6 mm | 4 | |
| 11 Sept. | Mist | 19° /14° | 2.7 mm | 5 | |
| 12 Sept. | Overcast | 17° /13° | 1.4 mm | 4 | |
| 13 Sept. | Mist | 18° /11° | 0.1 mm | 4 | |
| 14 Sept. | Partly cloudy | 14° /9° | 17.8 mm | 4 | |
| 15 Sept. | Cloudy | 16° /7° | 0 mm | 5 | |
| 16 Sept. | Patchy rain possible | 17° /11° | 0.6 mm | 4 | |
| 17 Sept. | Light rain shower | 16° /9° | 0.6 mm | 4 | |
| 18 Sept. | Overcast | 15° /7° | 0 mm | 4 | |
| 19 Sept. | Light rain shower | 17° /10° | 3 mm | 5 | |
| 20 Sept. | Light rain shower | 17° /11° | 4.4 mm | 5 | |
| 21 Sept. | Cloudy | 17° /10° | 0 mm | 5 | |
| 22 Sept. | Partly cloudy | 15° /9° | 0.3 mm | 4 | |
| 23 Sept. | Light rain | 16° /10° | 11 mm | 4 | |
| 24 Sept. | Patchy rain possible | 15° /11° | 0.7 mm | 4 | |
| 25 Sept. | Cloudy | 15° /12° | 2.4 mm | 4 | |
| 26 Sept. | Partly cloudy | 15° /12° | 5.6 mm | 4 | |
| 27 Sept. | Light rain shower | 16° /12° | 12.3 mm | 4 | |
| 28 Sept. | Overcast | 13° /9° | 4.4 mm | 4 | |
| 29 Sept. | Mist | 13° /9° | 0.8 mm | 4 | |
| 30 Sept. | Light rain shower | 13° /7° | 2.5 mm | 4 | |
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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.
Turku in September - FAQ
What are the expected maximum and minimum temperatures in Turku during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Turku during September?
Significant rainfall exceeding 189.5 mm is expected in Turku during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
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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