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Weather in Thun for September 2026

Your guide to Thun weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Thun has been nearly identical to the historical average, with a temperature of 20.3 °C (showing only a slight deviation of 0.2 °C).

  • Expect cooler weather in the next days in Thun with the forecast suggesting a temperature of 16.3 °C, lower than the historical average.

  • In general, the average temperature in Thun at the beginning of September is 20.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.3 °C by the end of September.

    • Rain 🌧️

  • Thun experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 146.6 mm.

Average dry days
6
Dry days
Average rainy days
24
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/7°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Thun Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
19°
2
Light rain shower
19°
3
Sunny
21°
4
Cloudy
21°
5
Sunny
19°
6
Sunny
22°
7
Sunny
24°
8
Sunny
23°
9
Moderate or heavy rain shower
18°
10
Patchy rain possible
16°
11
Sunny
19°
12
Light rain shower
17°
13
Overcast
19°
14
Sunny
20°
15
Sunny
22°
16
Light rain shower
18°
17
Overcast
14°
18
Overcast
14°
19
Overcast
16°
20
Overcast
17°
21
Sunny
16°
22
Sunny
16°
23
Overcast
13°
24
Sunny
15°
25
Overcast
15°
26
Overcast
13°
27
Sunny
15°
28
Partly cloudy
14°
29
Sunny
16°
30
Mist
19°

Temperatures trend during September in Thun

See the weather trend as well as the moving average line

September weather in Thun day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 19° /8° 6.2 mm 5
2 Sept. Light rain shower
Light rain shower
 19° /9° 7.6 mm 5
3 Sept. Sunny
Sunny
 21° /9° 4.7 mm 6
4 Sept. Cloudy
Cloudy
 21° /9° 11.4 mm 5
5 Sept. Sunny
Sunny
 19° /9° 3.1 mm 4
6 Sept. Sunny
Sunny
 22° /11° 0.1 mm 6
7 Sept. Sunny
Sunny
 24° /14° 0.1 mm 6
8 Sept. Sunny
Sunny
 23° /13° 4.5 mm 6
9 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /9° 15.2 mm 4
10 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 1.8 mm 4
11 Sept. Sunny
Sunny
 19° /9° 3.3 mm 5
12 Sept. Light rain shower
Light rain shower
 17° /8° 4.8 mm 4
13 Sept. Overcast
Overcast
 19° /11° 0 mm 5.3
14 Sept. Sunny
Sunny
 20° /13° 0.1 mm 5.6
15 Sept. Sunny
Sunny
 22° /13° 0.1 mm 5.7
16 Sept. Light rain shower
Light rain shower
 18° /9° 9.1 mm 5
17 Sept. Overcast
Overcast
 14° /6° 9.4 mm 4
18 Sept. Overcast
Overcast
 14° /10° 0 mm 4
19 Sept. Overcast
Overcast
 16° /10° 0 mm 5
20 Sept. Overcast
Overcast
 17° /13° 0 mm 5
21 Sept. Sunny
Sunny
 16° /12° 0 mm 5
22 Sept. Sunny
Sunny
 16° /12° 0 mm 5
23 Sept. Overcast
Overcast
 13° /5° 15.7 mm 2
24 Sept. Sunny
Sunny
 15° /9° 0 mm 4
25 Sept. Overcast
Overcast
 15° /12° 0 mm 4
26 Sept. Overcast
Overcast
 13° /8° 13.1 mm 3
27 Sept. Sunny
Sunny
 15° /5° 1.9 mm 4
28 Sept. Partly cloudy
Partly cloudy
 14° /5° 3.8 mm 4
29 Sept. Sunny
Sunny
 16° /7° 0 mm 4
30 Sept. Mist
Mist
 19° /9° 0.8 mm 4
Next
Important Notice
Our weather forecast for Thun 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 Thun forecast closer to your planned date for the most up-to-date weather information.
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Thun in September - FAQ

What are the expected maximum and minimum temperatures in Thun during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Thun during September?
Significant rainfall exceeding 146.6 mm is expected in Thun during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Thun during September?
The average wind speed in Thun during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Thun

Explore the daily rainfall trends and prepare for Thuns September weather 💧
Typically, Thun has 24 rainy days in September with a total of 146.6 mm of rainfall.

UV exposure in Thun during September

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

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Location coordinates Where is Thun?

Get accurate weather forecasts for Thun, located at latitude 46.751 and longitude 7.622. Stay updated with localized weather information tailored for Thun.

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