Oulu
September
Weather in Oulu for September 2025
Your guide to Oulu weather in September - trends and predictions
In general, the average temperature in Oulu at the beginning of September is 17.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.3 °C by the end of September.
Expect significant rainfall in Oulu during September, with an average of 17 rainy days.
Is September a good time to visit Oulu? check out the best time to travel to Oulu page.
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13
Dry days
17
Rainy days
0
Snow days
14°/9°
Temperatures
20 km/h
Avg max wind
85 %
Avg humidity
Oulu in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2 18° | 3 16° | 4 18° | 5 17° | 6  18° | 7  18° |
| 8  19° | 9 20° | 10  21° | 11 18° | 12 17° | 13 14° | 14 12° |
| 15 12° | 16 13° | 17 12° | 18 12° | 19  15° | 20 14° | 21 10° |
| 22 14° | 23 12° | 24 13° | 25 14° | 26 13° | 27 14° | 28 10° |
| 29 11° | 30 11° |
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Temperatures trend during September in Oulu
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. | Patchy rain possible | 17° /12° | 2.6 mm | 4 | |
| 2 Sept. | Light rain shower | 18° /11° | 1.2 mm | 4 | |
| 3 Sept. | Light rain shower | 16° /12° | 4.1 mm | 4 | |
| 4 Sept. | Patchy rain possible | 18° /11° | 0.9 mm | 5 | |
| 5 Sept. | Light rain shower | 17° /12° | 1.4 mm | 5 | |
| 6 Sept. | Partly cloudy | 18° /12° | 0 mm | 5 | |
| 7 Sept. | Cloudy | 18° /10° | 0 mm | 5 | |
| 8 Sept. | Mist | 19° /11° | 0 mm | 5 | |
| 9 Sept. | Partly cloudy | 20° /12° | 0.7 mm | 6 | |
| 10 Sept. | Overcast | 21° /13° | 0 mm | 5 | |
| 11 Sept. | Partly cloudy | 18° /12° | 2.5 mm | 5 | |
| 12 Sept. | Fog | 17° /11° | 0.7 mm | 4 | |
| 13 Sept. | Mist | 14° /10° | 3.9 mm | 3 | |
| 14 Sept. | Cloudy | 12° /6° | 1.9 mm | 3 | |
| 15 Sept. | Overcast | 12° /6° | 0 mm | 3 | |
| 16 Sept. | Light rain shower | 13° /5° | 3.5 mm | 4 | |
| 17 Sept. | Light rain shower | 12° /7° | 9.4 mm | 3 | |
| 18 Sept. | Overcast | 12° /6° | 0 mm | 3 | |
| 19 Sept. | Light rain | 15° /7° | 3.7 mm | 4 | |
| 20 Sept. | Light rain shower | 14° /7° | 2.2 mm | 3 | |
| 21 Sept. | Light rain | 10° /5° | 2.6 mm | 4 | |
| 22 Sept. | Overcast | 14° /7° | 0.1 mm | 3 | |
| 23 Sept. | Light rain shower | 12° /8° | 8 mm | 3 | |
| 24 Sept. | Light rain shower | 13° /7° | 3.5 mm | 3 | |
| 25 Sept. | Light rain | 14° /8° | 2.2 mm | 4 | |
| 26 Sept. | Patchy rain possible | 13° /8° | 1.5 mm | 3 | |
| 27 Sept. | Patchy rain possible | 14° /6° | 13.3 mm | 4 | |
| 28 Sept. | Patchy rain possible | 10° /6° | 0.4 mm | 3 | |
| 29 Sept. | Light drizzle | 11° /6° | 0.9 mm | 3 | |
| 30 Sept. | Light rain shower | 11° /7° | 3.4 mm | 3 | |
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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.
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 14° 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 81.9 mm spread over approximately 17 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.
What to pack to Oulu in September?
As you prepare for your trip to Oulu in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Oulu, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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