Weather in Norway for September 2025
In general, the average temperature in Norway at the beginning of September is 17 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.9 °C by the end of September.
Norway experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 193 mm.
Temperatures
Rain 🌧️
Norway Weather September
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2  16° | 3  16° | 4  17° | 5 18° | 6 17° | 7 18° |
| 8 18° | 9 17° | 10 16° | 11  15° | 12  13° | 13 13° | 14 13° |
| 15 14° | 16 13° | 17 13° | 18 16° | 19 15° | 20 13° | 21 14° |
| 22 14° | 23 13° | 24 13° | 25 13° | 26 13° | 27 13° | 28 13° |
| 29 12° | 30 13° |
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Temperatures trend during September in Norway
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 17° /11° | 0 mm | 5 | |
| 2 Sept. | Partly cloudy | 16° /11° | 0 mm | 5 | |
| 3 Sept. | Cloudy | 16° /11° | 14.8 mm | 4 | |
| 4 Sept. | Light rain shower | 17° /12° | 6.5 mm | 4 | |
| 5 Sept. | Patchy rain possible | 18° /12° | 7.4 mm | 5 | |
| 6 Sept. | Patchy rain possible | 17° /13° | 0.1 mm | 4 | |
| 7 Sept. | Patchy rain possible | 18° /13° | 0.4 mm | 5 | |
| 8 Sept. | Partly cloudy | 18° /13° | 2.9 mm | 5 | |
| 9 Sept. | Partly cloudy | 17° /12° | 4.4 mm | 5 | |
| 10 Sept. | Light rain shower | 16° /12° | 7.6 mm | 4 | |
| 11 Sept. | Moderate or heavy rain shower | 15° /10° | 20.9 mm | 4 | |
| 12 Sept. | Overcast | 13° /10° | 9.7 mm | 3 | |
| 13 Sept. | Partly cloudy | 13° /9° | 0.8 mm | 4 | |
| 14 Sept. | Sunny | 13° /8° | 2.3 mm | 3 | |
| 15 Sept. | Partly cloudy | 14° /10° | 8.6 mm | 4 | |
| 16 Sept. | Light rain shower | 13° /10° | 1.9 mm | 3 | |
| 17 Sept. | Partly cloudy | 13° /9° | 0.6 mm | 4 | |
| 18 Sept. | Overcast | 16° /10° | 5.1 mm | 4 | |
| 19 Sept. | Cloudy | 15° /11° | 10.1 mm | 4 | |
| 20 Sept. | Sunny | 13° /9° | 7.7 mm | 4 | |
| 21 Sept. | Patchy rain possible | 14° /10° | 5.2 mm | 4 | |
| 22 Sept. | Moderate or heavy rain shower | 14° /11° | 13.2 mm | 3 | |
| 23 Sept. | Moderate or heavy rain shower | 13° /10° | 12.4 mm | 4 | |
| 24 Sept. | Moderate or heavy rain shower | 13° /8° | 8.6 mm | 3 | |
| 25 Sept. | Light rain shower | 13° /9° | 13.5 mm | 3 | |
| 26 Sept. | Patchy rain possible | 13° /9° | 6.7 mm | 4 | |
| 27 Sept. | Patchy rain possible | 13° /9° | 5.6 mm | 4 | |
| 28 Sept. | Light rain shower | 13° /8° | 6 mm | 3 | |
| 29 Sept. | Patchy rain possible | 12° /8° | 5.9 mm | 3 | |
| 30 Sept. | Moderate rain at times | 13° /9° | 4.2 mm | 3 | |
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Guide for Norway in September
In September, Norway experiences a transition from late summer to early autumn, bringing about noticeable changes in the weather. At the beginning of the month, southern parts of Norway, including Oslo, typically enjoy mild temperatures with occasional rainfall.
The average temperature in Oslo at the start of September is around 14°, making it a pleasant time to explore the city and its surrounding natural beauty.
However, as the month progresses, temperatures begin to drop gradually, and by the end of September, the average temperature in Oslo decreases to around 10°. The weather becomes cooler, and there is an increased chance of rain, particularly towards the latter part of the month.
In northern Norway, cities like Tromsø experience a more significant drop in temperatures throughout September. At the beginning of the month, the average temperature in Tromsø hovers around 10°, but by the end of September, it decreases to approximately 6°.
Additionally, as September progresses, the days become noticeably shorter, with fewer hours of daylight, marking the approach of the autumn equinox.
Overall, September in Norway showcases the transition from the lingering warmth of summer to the cooler and darker days of early autumn, making it a unique time to experience the changing seasons in this beautiful Scandinavian country.
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Norway in September - FAQ
September rainfall patterns in Norway
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