Trøndelag (Trondheim)
September
Weather in Trøndelag for September 2025
Your guide to Trøndelag weather in September - trends and predictions
Snowfall in Trøndelag during September is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Trøndelag at the beginning of September is 17.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.6 °C by the end of September.
Trøndelag in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 117.7 mm.
Snow Forecast ❄️
Temperatures
Rain 🌧️
11
Dry days
18
Rainy days
1
Snow days
14°/7°
Temperatures
13 km/h
Avg max wind
80 %
Avg humidity
Trøndelag in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  16° | 2  16° | 3  14° | 4  17° | 5 17° | 6  20° | 7 22° |
| 8 21° | 9  21° | 10 11° | 11 18° | 12 13° | 13 11° | 14 13° |
| 15 16° | 16 12° | 17 14° | 18 18° | 19 16° | 20 14° | 21 14° |
| 22  13° | 23 11° | 24 10° | 25 11° | 26  13° | 27 11° | 28 11° |
| 29 9° | 30 9° |
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Temperatures trend during September in Trøndelag
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Sept. | Mist | 16° /6° | 0.3 mm | 0 cm | |
| 2 Sept. | Cloudy | 16° /7° | 0.1 mm | 0 cm | |
| 3 Sept. | Light drizzle | 14° /7° | 0.8 mm | 0 cm | |
| 4 Sept. | Light rain shower | 17° /11° | 9.3 mm | 0 cm | |
| 5 Sept. | Light rain shower | 17° /10° | 11.1 mm | 0 cm | |
| 6 Sept. | Overcast | 20° /10° | 0.5 mm | 0 cm | |
| 7 Sept. | Overcast | 22° /11° | 0 mm | 0 cm | |
| 8 Sept. | Overcast | 21° /11° | 0.1 mm | 0 cm | |
| 9 Sept. | Partly cloudy | 21° /9° | 6.3 mm | 0 cm | |
| 10 Sept. | Light rain shower | 11° /9° | 15.9 mm | 0 cm | |
| 11 Sept. | Light rain shower | 18° /8° | 4.5 mm | 0 cm | |
| 12 Sept. | Partly cloudy | 13° /6° | 4.4 mm | 0 cm | |
| 13 Sept. | Overcast | 11° /4° | 0.2 mm | 0 cm | |
| 14 Sept. | Overcast | 13° /2° | 0 mm | 0 cm | |
| 15 Sept. | Partly cloudy | 16° /4° | 0 mm | 0 cm | |
| 16 Sept. | Light rain shower | 12° /5° | 1.5 mm | 0 cm | |
| 17 Sept. | Partly cloudy | 14° /6° | 0.5 mm | 0 cm | |
| 18 Sept. | Partly cloudy | 18° /7° | 0.2 mm | 0 cm | |
| 19 Sept. | Light rain shower | 16° /9° | 5.2 mm | 0 cm | |
| 20 Sept. | Light rain shower | 14° /8° | 1.3 mm | 0 cm | |
| 21 Sept. | Light rain | 14° /7° | 2.8 mm | 0 cm | |
| 22 Sept. | Moderate rain | 13° /7° | 6.2 mm | 0 cm | |
| 23 Sept. | Light rain shower | 11° /7° | 4.7 mm | 0 cm | |
| 24 Sept. | Patchy rain possible | 10° /5° | 1.6 mm | 0 cm | |
| 25 Sept. | Patchy light drizzle | 11° /5° | 13.7 mm | 0 cm | |
| 26 Sept. | Sunny | 13° /6° | 1.7 mm | 0 cm | |
| 27 Sept. | Light rain shower | 11° /5° | 4.7 mm | 0 cm | |
| 28 Sept. | Patchy rain possible | 11° /4° | 11 mm | 1.2 cm | |
| 29 Sept. | Light rain shower | 9° /5° | 6.2 mm | 0 cm | |
| 30 Sept. | Light rain shower | 9° /3° | 3 mm | 0 cm | |
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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.
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 14° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Trøndelag during September?
Significant rainfall exceeding 117.7 mm is expected in Trøndelag during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Trøndelag in September 2025?
Trøndelag typically sees 1.195 cm of snowfall during September.
What are the typical wind conditions in Trøndelag during September?
The average wind speed in Trøndelag during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
Trøndelag snow forecast September 2025
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 💧
UV exposure in Trøndelag during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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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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