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St. Moritz
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Switzerland weather

Weather in St. Moritz for September 2025

Your guide to St. Moritz weather in September - trends and predictions

    Snow Forecast ❄️

  • With an average of 5 snowy days, St. Moritz usually enjoys a light touch of snow in September.
    According to St. Moritz snow forecast for September 2025, no snow is expected until the end of the month.

    • Temperatures

  • Until now, September 2025 in St. Moritz has been significantly cooler than historical averages by -2 °C, with average temperature of 12.5 °C.

  • The forecast for the next days in St. Moritz predicts temperatures to be around 14 °C, close to the historical average.

  • In general, the average temperature in St. Moritz at the beginning of September is 15.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11 °C by the end of September.

Average dry days
8
Dry days
Average rainy days
17
Rainy days
Average snowy days
5
Snow days
Average temperatures
12°/0°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
81 %
Avg humidity

St. Moritz Weather September

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

Temperatures trend during September in St. Moritz

See the weather trend as well as the moving average line

September weather in St. Moritz day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
1 Sept. Partly cloudy
Partly cloudy
 14° /2° 8.5 mm 0 cm
2 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 14° /1° 5.4 mm 0 cm
3 Sept. Sunny
Sunny
 15° /1° 1.2 mm 0 cm
4 Sept. Overcast
Overcast
 17° /3° 3.3 mm 0 cm
5 Sept. Sunny
Sunny
 13° /2° 6.8 mm 0 cm
6 Sept. Sunny
Sunny
 17° /1° 0 mm 0 cm
7 Sept. Sunny
Sunny
 18° /1° 0 mm 0 cm
8 Sept. Patchy rain possible
Patchy rain possible
 17° /3° 2 mm 0 cm
9 Sept. Patchy rain possible
Patchy rain possible
 14° /2° 9.4 mm 0 cm
10 Sept. Patchy rain possible
Patchy rain possible
 14° /2° 5.2 mm 0 cm
11 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 14° /1° 3.8 mm 0 cm
12 Sept. Partly cloudy
Partly cloudy
 12° /-1° 5.3 mm 3 cm
13 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 9° /-2° 7.9 mm 1.7 cm
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-3° 4 mm 1.8 cm
15 Sept. Sunny
Sunny
 15° /1° 0.1 mm 0 cm
16 Sept. Patchy rain possible
Patchy rain possible
 13° /0° 0.8 mm 0 cm
17 Sept. Sunny
Sunny
 11° /-2° 0 mm 0 cm
18 Sept. Sunny
Sunny
 19° /2° 0 mm 0 cm
19 Sept. Sunny
Sunny
 19° /3° 0 mm 0 cm
20 Sept. Sunny
Sunny
 18° /5° 0 mm 0 cm
21 Sept. Sunny
Sunny
 17° /4° 0 mm 0 cm
22 Sept. Patchy rain possible
Patchy rain possible
 16° /4° 1.3 mm 0 cm
23 Sept. Patchy rain possible
Patchy rain possible
 13° /3° 0.4 mm 0 cm
24 Sept. Moderate rain
Moderate rain
 13° /4° 5.9 mm 0 cm
25 Sept. Moderate rain
Moderate rain
 11° /2° 10.6 mm 0 cm
26 Sept. Patchy rain possible
Patchy rain possible
 10° /1° 1.7 mm 0 cm
27 Sept. Partly cloudy
Partly cloudy
 11° /-2° 0 mm 0 cm
28 Sept. Sunny
Sunny
 10° /-3° 10 mm 7.5 cm
29 Sept. Partly cloudy
Partly cloudy
 10° /-4° 0.1 mm 0.1 cm
30 Sept. Patchy rain possible
Patchy rain possible
 12° /-1° 0 mm 0 cm
Next
Important Notice
Our weather forecast for St. Moritz 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 St. Moritz forecast closer to your planned date for the most up-to-date weather information.
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St. Moritz in September - FAQ

What are the expected maximum and minimum temperatures in St. Moritz during September?
Prepare for cooler days with highs just around 12° and colder nights, dipping below 0°.
How much rainfall should be expected in St. Moritz during September?
Significant rainfall exceeding 137.4 mm is expected in St. Moritz during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
Will it snow in St. Moritz in September 2025?
St. Moritz experiences an average snowfall of 16.67 cm during September, occurring over 5 days.
What are the typical wind conditions in St. Moritz during September?
The average wind speed in St. Moritz during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

St. Moritz snow forecast September 2025

Track daily snowfall levels and discover St. Moritz’s snowy potential this September ❄️

September rainfall patterns in St. Moritz

Explore the daily rainfall trends and prepare for St. Moritzs September weather 💧

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Location coordinates Where is St. Moritz?

Get accurate weather forecasts for St. Moritz, located at latitude 46.499 and longitude 9.843. Stay updated with localized weather information tailored for St. Moritz.

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