Oslo
September
Weather in Oslo for September 2026
Your guide to Oslo weather in September - trends and predictions
Until now, September 2026 in Oslo is cooler than usual, with temperatures averaging 14.6 °C, this is 3 °C below the typical seasonal average.
Expect cooler weather in the next days in Oslo with the forecast suggesting a temperature of 15.3 °C, lower than the historical average.
In general, the average temperature in Oslo at the beginning of September is 17.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.9 °C by the end of September.
The climate of Oslo in September is notably wet, with an average of 11 rainy days, and a total of 96.9 mm of precipitation.
Temperatures
Rain 🌧️
19
Dry days
11
Rainy days
0
Snow days
15°/7°
Temperatures
11 km/h
Avg max wind
80 %
Avg humidity
Oslo Weather September
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Temperatures trend during September in Oslo
See the weather trend as well as the moving average line
September weather in Oslo day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 20° /9° | 1.3 mm | 5 | |
| 2 Sept. | Sunny | 17° /9° | 2 mm | 4 | |
| 3 Sept. |  Patchy rain possible | 15° /8° | 1.8 mm | 4 | |
| 4 Sept. |  Overcast | 16° /9° | 4.1 mm | 3 | |
| 5 Sept. |  Cloudy | 18° /9° | 0.4 mm | 4 | |
| 6 Sept. | Sunny | 19° /9° | 0.2 mm | 4 | |
| 7 Sept. |  Partly cloudy | 20° /8° | 0.9 mm | 4 | |
| 8 Sept. | Patchy rain possible | 19° /10° | 0.3 mm | 4 | |
| 9 Sept. | Light rain shower | 18° /9° | 4 mm | 4 | |
| 10 Sept. | Overcast | 17° /9° | 2.2 mm | 4 | |
| 11 Sept. | Patchy rain possible | 15° /8° | 3.5 mm | 3 | |
| 12 Sept. | Light rain shower | 14° /8° | 6.3 mm | 3 | |
| 13 Sept. | Sunny | 17° /8° | 0 mm | 2.4 | |
| 14 Sept. | Overcast | 16° /8° | 0 mm | 0.9 | |
| 15 Sept. |  Fog | 15° /10° | 16 mm | 0.3 | |
| 16 Sept. | Overcast | 18° /8° | 0.7 mm | 2.1 | |
| 17 Sept. | Overcast | 15° /7° | 0 mm | 4 | |
| 18 Sept. | Overcast | 15° /6° | 0 mm | 4 | |
| 19 Sept. | Overcast | 12° /5° | 2.2 mm | 4 | |
| 20 Sept. | Sunny | 14° /6° | 0 mm | 4 | |
| 21 Sept. | Cloudy | 15° /4° | 0 mm | 4 | |
| 22 Sept. | Sunny | 14° /3° | 0 mm | 4 | |
| 23 Sept. | Sunny | 19° /3° | 0 mm | 4 | |
| 24 Sept. | Fog | 18° /10° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 13° /9° | 4.6 mm | 3 | |
| 26 Sept. | Overcast | 13° /8° | 0 mm | 3 | |
| 27 Sept. |  Moderate or heavy rain shower | 12° /6° | 8.9 mm | 3 | |
| 28 Sept. |  Heavy rain at times | 12° /6° | 4 mm | 3 | |
| 29 Sept. | Patchy rain possible | 11° /5° | 1.8 mm | 3 | |
| 30 Sept. | Patchy rain possible | 11° /4° | 5 mm | 3 | |
| Next | |||||
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.
Change Month
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 96.9 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
Will it snow in Oslo in September 2026?
Oslo typically sees 0 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.
September rainfall patterns in Oslo
Explore the daily rainfall trends and prepare for Oslos September weather 💧
Typically, Oslo has 11 rainy days in September with a total of 96.9 mm of rainfall.
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