Oulu
September
Weather in Oulu for September 2026
Your guide to Oulu weather in September - trends and predictions
Until now, September 2026 in Oulu is cooler than usual, with temperatures averaging 13.6 °C, this is 4 °C below the typical seasonal average.
Expect cooler weather in the next days in Oulu with the forecast suggesting a temperature of 13.8 °C, lower than the historical average.
In general, the average temperature in Oulu at the beginning of September is 17.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.1 °C by the end of September.
Oulu experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 75.1 mm.
Temperatures
Rain 🌧️
9
Dry days
21
Rainy days
0
Snow days
15°/9°
Temperatures
20 km/h
Avg max wind
81 %
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° | 2.4 mm | 3 | |
| 2 Sept. | Light rain shower | 18° /10° | 0.6 mm | 4 | |
| 3 Sept. | Light rain shower | 17° /11° | 5.3 mm | 3 | |
| 4 Sept. | Patchy rain possible | 18° /11° | 1.7 mm | 4 | |
| 5 Sept. | Patchy rain possible | 17° /11° | 1.1 mm | 4 | |
| 6 Sept. |  Partly cloudy | 17° /10° | 0.1 mm | 4 | |
| 7 Sept. |  Cloudy | 17° /9° | 0.9 mm | 4 | |
| 8 Sept. |  Mist | 18° /11° | 4.4 mm | 4 | |
| 9 Sept. | Partly cloudy | 18° /11° | 1.4 mm | 4 | |
| 10 Sept. |  Overcast | 19° /12° | 0.8 mm | 4 | |
| 11 Sept. | Partly cloudy | 18° /11° | 1.3 mm | 4 | |
| 12 Sept. | Fog | 17° /11° | 0.4 mm | 4 | |
| 13 Sept. |  Sunny | 13° /7° | 3.1 mm | 1.1 | |
| 14 Sept. | Sunny | 12° /7° | 0 mm | 1.6 | |
| 15 Sept. | Overcast | 13° /5° | 0 mm | 1.5 | |
| 16 Sept. | Overcast | 13° /8° | 10.8 mm | 0.6 | |
| 17 Sept. | Light rain shower | 15° /11° | 6.9 mm | 3 | |
| 18 Sept. | Patchy rain possible | 12° /10° | 1.1 mm | 3 | |
| 19 Sept. | Cloudy | 14° /7° | 1.9 mm | 4 | |
| 20 Sept. | Light rain shower | 11° /9° | 15.5 mm | 3 | |
| 21 Sept. | Light rain shower | 11° /9° | 14.1 mm | 3 | |
| 22 Sept. | Patchy rain possible | 11° /7° | 0.2 mm | 4 | |
| 23 Sept. | Sunny | 17° /8° | 0.8 mm | 5 | |
| 24 Sept. | Mist | 16° /11° | 0.6 mm | 5 | |
| 25 Sept. | Mist | 17° /11° | 0 mm | 5 | |
| 26 Sept. | Overcast | 18° /12° | 0 mm | 5 | |
| 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?
During September, expect a variety of temperatures with highs around 15° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Oulu during September?
Moderate rainfall is anticipated in Oulu during September, with a total of 75.1 mm spread over approximately 21 days. Considering plans for rainy days is advisable.
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 💧
Typically, Oulu has 21 rainy days in September with a total of 75.1 mm of rainfall.
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