Trøndelag (Trondheim)
September
Weather in Trøndelag for September 2026
Your guide to Trøndelag weather in September - trends and predictions
Wind gusts - See hour by hour.
Until now, September 2026 in Trøndelag is cooler than usual, with temperatures averaging 12.6 °C, this is 2.1 °C below the typical seasonal average.
In general, the average temperature in Trøndelag at the beginning of September is 16.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.7 °C by the end of September.
The climate of Trøndelag in September is notably wet, with an average of 12 rainy days, and a total of 107.4 mm of precipitation.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
18
Dry days
12
Rainy days
0
Snow days
15°/7°
Temperatures
14 km/h
Avg max wind
78 %
Avg humidity
Trøndelag Weather September
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What’s the Weather Like in Trøndelag This September?
Discover the average temperatures and weather trends across Trøndelag’s cities this September.
Temperatures trend during September in Trøndelag
See the weather trend as well as the moving average line
September weather in Trøndelag day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 17° /7° | 0.2 mm | 0 cm | |
| 2 Sept. |  Cloudy | 16° /8° | 1 mm | 0 cm | |
| 3 Sept. |  Light drizzle | 14° /8° | 1.4 mm | 0 cm | |
| 4 Sept. |  Light rain shower | 18° /9° | 4.7 mm | 0 cm | |
| 5 Sept. | Light rain shower | 17° /9° | 6 mm | 0 cm | |
| 6 Sept. |  Overcast | 17° /9° | 2.4 mm | 0 cm | |
| 7 Sept. | Overcast | 19° /10° | 4.5 mm | 0 cm | |
| 8 Sept. | Overcast | 19° /9° | 3.2 mm | 0 cm | |
| 9 Sept. |  Partly cloudy | 18° /8° | 5.8 mm | 0 cm | |
| 10 Sept. | Light rain shower | 14° /8° | 8.5 mm | 0 cm | |
| 11 Sept. | Light rain shower | 18° /8° | 2.7 mm | 0 cm | |
| 12 Sept. | Partly cloudy | 15° /7° | 2.9 mm | 0 cm | |
| 13 Sept. | Overcast | 13° /6° | 0.9 mm | 0 cm | |
| 14 Sept. | Overcast | 15° /4° | 0 mm | 0 cm | |
| 15 Sept. | Partly cloudy | 15° /5° | 1.1 mm | 0 cm | |
| 16 Sept. | Light rain shower | 12° /6° | 3.5 mm | 0 cm | |
| 17 Sept. | Partly cloudy | 13° /7° | 4.2 mm | 0 cm | |
| 18 Sept. | Partly cloudy | 16° /6° | 0.4 mm | 0 cm | |
| 19 Sept. | Light rain shower | 16° /8° | 5.1 mm | 0 cm | |
| 20 Sept. | Light rain shower | 13° /7° | 4.5 mm | 0 cm | |
| 21 Sept. | Light rain | 12° /6° | 8.8 mm | 0 cm | |
| 22 Sept. |  Moderate or heavy rain shower | 12° /6° | 11.5 mm | 0 cm | |
| 23 Sept. | Light rain shower | 10° /6° | 7 mm | 0 cm | |
| 24 Sept. | Patchy rain possible | 10° /5° | 2.5 mm | 0 cm | |
| 25 Sept. | Patchy light drizzle | 12° /5° | 7.7 mm | 0 cm | |
| 26 Sept. |  Sunny | 13° /6° | 1.6 mm | 0 cm | |
| 27 Sept. | Light rain shower | 13° /4° | 2.3 mm | 0 cm | |
| 28 Sept. | Patchy rain possible | 13° /5° | 7.7 mm | 0.6 cm | |
| 29 Sept. | Light rain shower | 11° /5° | 4.2 mm | 0 cm | |
| 30 Sept. | Sunny | 17° /9° | 0 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for Trøndelag 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 Trøndelag forecast closer to your planned date for the most up-to-date weather information.
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Trøndelag in September - FAQ
What are the expected maximum and minimum temperatures in Trøndelag 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 Trøndelag during September?
Significant rainfall exceeding 107.4 mm is expected in Trøndelag during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Trøndelag in September 2026?
Trøndelag typically sees 0.8 cm of snowfall during September.
What are the typical wind conditions in Trøndelag during September?
The average wind speed in Trøndelag during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
Trøndelag snow forecast September 2026
Track daily snowfall levels and discover Trøndelag’s snowy potential this September ❄️
September rainfall patterns in Trøndelag
Explore the daily rainfall trends and prepare for Trøndelags September weather 💧
Typically, Trøndelag has 12 rainy days in September with a total of 107.4 mm of rainfall.
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Where is Trøndelag?Get accurate weather forecasts for Trøndelag, located at latitude 63.43 and longitude 10.395. Stay updated with localized weather information tailored for Trøndelag.
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