Oslo
September
Weather in Oslo for September 2025
Your guide to Oslo weather in September - trends and predictions
In general, the average temperature in Oslo at the beginning of September is 18.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.9 °C by the end of September.
Oslo experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 93 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
15°/7°
Temperatures
11 km/h
Avg max wind
79 %
Avg humidity
Oslo in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2 17° | 3  14° | 4  17° | 5  20° | 6 20° | 7  21° |
| 8 20° | 9 18° | 10 17° | 11 16° | 12  15° | 13 14° | 14 14° |
| 15 14° | 16 13° | 17 13° | 18 14° | 19 13° | 20 14° | 21  15° |
| 22 15° | 23 14° | 24 11° | 25 13° | 26 12° | 27 12° | 28 12° |
| 29 11° | 30 12° |
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Temperatures trend during September in Oslo
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. | Sunny | 20° /8° | 0 mm | 6 | |
| 2 Sept. | Sunny | 17° /9° | 3 mm | 4 | |
| 3 Sept. | Patchy rain possible | 14° /9° | 2.4 mm | 4 | |
| 4 Sept. | Overcast | 17° /9° | 2.1 mm | 4 | |
| 5 Sept. | Cloudy | 20° /9° | 0.1 mm | 5 | |
| 6 Sept. | Sunny | 20° /9° | 0 mm | 5 | |
| 7 Sept. | Partly cloudy | 21° /9° | 0.2 mm | 6 | |
| 8 Sept. | Patchy rain possible | 20° /10° | 0.1 mm | 5 | |
| 9 Sept. | Overcast | 18° /10° | 5.2 mm | 5 | |
| 10 Sept. | Overcast | 17° /9° | 1.4 mm | 4 | |
| 11 Sept. | Patchy rain possible | 16° /8° | 1.3 mm | 4 | |
| 12 Sept. | Moderate or heavy rain shower | 15° /8° | 6.5 mm | 4 | |
| 13 Sept. | Overcast | 14° /6° | 6.6 mm | 4 | |
| 14 Sept. | Cloudy | 14° /5° | 0.5 mm | 3 | |
| 15 Sept. | Patchy rain possible | 14° /5° | 0.2 mm | 4 | |
| 16 Sept. | Patchy rain possible | 13° /7° | 5.7 mm | 3 | |
| 17 Sept. | Overcast | 13° /5° | 0.2 mm | 3 | |
| 18 Sept. | Cloudy | 14° /6° | 5.4 mm | 4 | |
| 19 Sept. | Overcast | 13° /6° | 2.3 mm | 4 | |
| 20 Sept. | Patchy rain possible | 14° /4° | 0.2 mm | 3 | |
| 21 Sept. | Heavy rain at times | 15° /7° | 2.4 mm | 4 | |
| 22 Sept. | Sunny | 15° /7° | 9.3 mm | 4 | |
| 23 Sept. | Moderate rain at times | 14° /7° | 3.3 mm | 3 | |
| 24 Sept. | Patchy rain possible | 11° /6° | 1.9 mm | 3 | |
| 25 Sept. | Light rain shower | 13° /6° | 4.6 mm | 4 | |
| 26 Sept. | Partly cloudy | 12° /6° | 4 mm | 3 | |
| 27 Sept. | Moderate or heavy rain shower | 12° /7° | 11.1 mm | 3 | |
| 28 Sept. | Heavy rain at times | 12° /6° | 5 mm | 3 | |
| 29 Sept. | Patchy rain possible | 11° /4° | 1.9 mm | 3 | |
| 30 Sept. | Patchy rain possible | 12° /4° | 6.2 mm | 3 | |
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Important Notice
Our weather forecast for Oslo 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 Oslo forecast closer to your planned date for the most up-to-date weather information.
Oslo in September - FAQ
What are the expected maximum and minimum temperatures in Oslo during September?
During September, expect a variety of temperatures with highs around 15° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Oslo during September?
Moderate rainfall is anticipated in Oslo during September, with a total of 93 mm spread over approximately 21 days. Considering plans for rainy days is advisable.
Will it snow in Oslo in September 2025?
Oslo typically sees 0.0075 cm of snowfall during September.
What are the typical wind conditions in Oslo during September?
The average wind speed in Oslo during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Oslo in September?
As you prepare for your trip to Oslo 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 Oslo, 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
September rainfall patterns in Oslo
Explore the daily rainfall trends and prepare for Oslos September weather 💧
UV exposure in Oslo during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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