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Weather in Trøndelag for September 2025

Your guide to Trøndelag weather in September - trends and predictions
  • 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 experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.

  • Is September a good time to visit Trøndelag? check out the best time to travel to Trøndelag page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/8°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
82 %
Avg humidity

Trøndelag in September average weather

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Temperatures trend during September in Trøndelag

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain Snow More
1 Sept. Mist
Mist
16° /6° 0.3 mm 0 cm
2 Sept. Cloudy
Cloudy
16° /7° 0.1 mm 0 cm
3 Sept. Light drizzle
Light drizzle
14° /7° 0.8 mm 0 cm
4 Sept. Light rain shower
Light rain shower
17° /11° 9.3 mm 0 cm
5 Sept. Light rain shower
Light rain shower
17° /10° 11.1 mm 0 cm
6 Sept. Overcast
Overcast
20° /10° 0.5 mm 0 cm
7 Sept. Overcast
Overcast
22° /11° 0 mm 0 cm
8 Sept. Overcast
Overcast
21° /11° 0.1 mm 0 cm
9 Sept. Partly cloudy
Partly cloudy
21° /9° 6.3 mm 0 cm
10 Sept. Light rain shower
Light rain shower
11° /9° 15.9 mm 0 cm
11 Sept. Light rain shower
Light rain shower
18° /8° 4.5 mm 0 cm
12 Sept. Partly cloudy
Partly cloudy
13° /6° 4.4 mm 0 cm
13 Sept. Overcast
Overcast
11° /4° 0.2 mm 0 cm
14 Sept. Overcast
Overcast
13° /2° 0 mm 0 cm
15 Sept. Partly cloudy
Partly cloudy
16° /4° 0 mm 0 cm
16 Sept. Light rain shower
Light rain shower
12° /5° 1.5 mm 0 cm
17 Sept. Partly cloudy
Partly cloudy
14° /6° 0.5 mm 0 cm
18 Sept. Partly cloudy
Partly cloudy
18° /7° 0.2 mm 0 cm
19 Sept. Light rain shower
Light rain shower
16° /9° 5.2 mm 0 cm
20 Sept. Light rain shower
Light rain shower
14° /8° 1.3 mm 0 cm
21 Sept. Light rain
Light rain
14° /7° 2.8 mm 0 cm
22 Sept. Moderate rain
Moderate rain
13° /7° 6.2 mm 0 cm
23 Sept. Light rain shower
Light rain shower
11° /7° 4.7 mm 0 cm
24 Sept. Patchy rain possible
Patchy rain possible
10° /5° 1.6 mm 0 cm
25 Sept. Patchy light drizzle
Patchy light drizzle
11° /5° 13.7 mm 0 cm
26 Sept. Sunny
Sunny
13° /6° 1.7 mm 0 cm
27 Sept. Light rain shower
Light rain shower
11° /5° 4.7 mm 0 cm
28 Sept. Patchy rain possible
Patchy rain possible
11° /4° 11 mm 1.2 cm
29 Sept. Light rain shower
Light rain shower
9° /5° 6.2 mm 0 cm
30 Sept. Light rain shower
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 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Trøndelag during September?
Significant rainfall exceeding 115.9 mm is expected in Trøndelag during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
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.

What to pack to Trøndelag in September?

As you prepare for your trip to Trøndelag 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 Trøndelag, 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 Trøndelag

Explore the daily rainfall trends and prepare for Trøndelags September weather 💧

September snowfall in Trøndelag

Track daily snowfall levels and discover Trøndelag’s snowy potential this September ❄️

UV exposure in Trøndelag during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates 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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