Oulu
September
Weather in Oulu for September 2026
Your guide to Oulu weather in September - trends and predictions
In general, the average temperature in Oulu at the beginning of September is 18.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.3 °C by the end of September.
Oulu experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 175.5 mm.
Temperatures
Rain 🌧️
20
Dry days
10
Rainy days
0
Snow days
16°/7°
Temperatures
20 km/h
Avg max wind
82 %
Avg humidity
Oulu Weather September
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Temperatures trend during September in Oulu
See the weather trend as well as the moving average line
September weather in Oulu day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 17° /11° | 1.7 mm | 4 | |
| 2 Sept. | Light rain shower | 19° /11° | 0.8 mm | 5 | |
| 3 Sept. | Light rain shower | 17° /12° | 5.9 mm | 4 | |
| 4 Sept. | Patchy rain possible | 19° /11° | 0.7 mm | 5 | |
| 5 Sept. | Light rain shower | 19° /12° | 1 mm | 5 | |
| 6 Sept. |  Partly cloudy | 19° /12° | 0.1 mm | 5 | |
| 7 Sept. |  Cloudy | 19° /12° | 1.2 mm | 5 | |
| 8 Sept. |  Mist | 19° /11° | 4.2 mm | 5 | |
| 9 Sept. | Partly cloudy | 20° /12° | 0.7 mm | 5 | |
| 10 Sept. |  Overcast | 20° /13° | 0.2 mm | 4 | |
| 11 Sept. | Partly cloudy | 20° /13° | 1.7 mm | 5 | |
| 12 Sept. | Fog | 18° /12° | 0.5 mm | 5 | |
| 13 Sept. | Mist | 15° /10° | 3.1 mm | 3 | |
| 14 Sept. | Cloudy | 13° /7° | 1.3 mm | 3 | |
| 15 Sept. | Overcast | 13° /7° | 2.4 mm | 3 | |
| 16 Sept. | Light rain shower | 14° /7° | 3.1 mm | 3 | |
| 17 Sept. |  Light drizzle | 12° /8° | 6.4 mm | 3 | |
| 18 Sept. | Overcast | 12° /7° | 0 mm | 3 | |
| 19 Sept. | Light rain | 14° /7° | 2.4 mm | 4 | |
| 20 Sept. | Light rain shower | 13° /7° | 5.5 mm | 3 | |
| 21 Sept. | Light rain | 11° /6° | 4.6 mm | 3 | |
| 22 Sept. | Overcast | 14° /7° | 5.1 mm | 3 | |
| 23 Sept. | Light rain shower | 11° /6° | 5.8 mm | 3 | |
| 24 Sept. | Light rain shower | 12° /6° | 2.3 mm | 3 | |
| 25 Sept. | Light rain | 13° /7° | 1.5 mm | 4 | |
| 26 Sept. | Patchy rain possible | 13° /8° | 1 mm | 3 | |
| 27 Sept. | Patchy rain possible | 14° /7° | 8.8 mm | 4 | |
| 28 Sept. | Patchy rain possible | 12° /6° | 0.3 mm | 3 | |
| 29 Sept. | Light drizzle | 11° /6° | 0.6 mm | 3 | |
| 30 Sept. | Light rain shower | 11° /6° | 2.3 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Oulu 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 Oulu forecast closer to your planned date for the most up-to-date weather information.
Change Month
Oulu in September - FAQ
What are the expected maximum and minimum temperatures in Oulu during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Oulu during September?
Significant rainfall exceeding 175.5 mm is expected in Oulu during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Oulu during September?
The average wind speed in Oulu during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Oulu
Explore the daily rainfall trends and prepare for Oulus September weather 💧
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