easeweather.com
St. Moritz
BaselBernBiel/BienneCarougeChurDavosDavos PlatzEngelbergGenèveGrindelwaldGstaadInterlakenIseltwaldLausanneLauterbrunnenLuganoLuzernMontreuxMürrenNeuchâtelSankt GallenSchaffhausenSeewis im Prätigau
St. Moritz
ThunWengenWinterthurZermattZürich More Locations
Switzerland weather

Weather in St. Moritz for September 2025

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

    Snow Forecast ❄️

  • Snowfall in St. Moritz during September is quite rare, with fewer than 2 snowy days on average.

    • Temperatures

  • In general, the average temperature in St. Moritz at the beginning of September is 16.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.4 °C by the end of September.

    • Rain 🌧️

  • St. Moritz experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 274.9 mm.

Average dry days
21
Dry days
Average rainy days
8
Rainy days
Average snowy days
1
Snow days
Average temperatures
15°/-2°
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
15°
2
Patchy rain possible
16°
3
Sunny
16°
4
Overcast
17°
5
Sunny
17°
6
Sunny
18°
7
Sunny
18°
8
Patchy rain possible
18°
9
Patchy rain possible
14°
10
Patchy rain possible
16°
11
Patchy light rain with thunder
15°
12
Partly cloudy
12°
13
Thundery outbreaks possible
7°
14
Moderate or heavy rain shower
6°
15
Thundery outbreaks possible
8°
16
Patchy rain possible
9°
17
Partly cloudy
11°
18
Moderate rain
12°
19
Patchy light rain with thunder
11°
20
Light rain shower
11°
21
Light rain shower
10°
22
Light rain shower
10°
23
Light sleet showers
6°
24
Partly cloudy
7°
25
Sunny
11°
26
Sunny
11°
27
Sunny
12°
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
 15° /2° 4.8 mm 0 cm
2 Sept. Patchy rain possible
Patchy rain possible
 16° /2° 5.3 mm 0 cm
3 Sept. Sunny
Sunny
 16° /2° 1.9 mm 0 cm
4 Sept. Overcast
Overcast
 17° /5° 4.9 mm 0 cm
5 Sept. Sunny
Sunny
 17° /4° 3.1 mm 0 cm
6 Sept. Sunny
Sunny
 18° /3° 0 mm 0 cm
7 Sept. Sunny
Sunny
 18° /2° 0.1 mm 0 cm
8 Sept. Patchy rain possible
Patchy rain possible
 18° /3° 2.7 mm 0 cm
9 Sept. Patchy rain possible
Patchy rain possible
 14° /2° 12.1 mm 0 cm
10 Sept. Patchy rain possible
Patchy rain possible
 16° /2° 2.4 mm 0 cm
11 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 15° /2° 5.5 mm 0 cm
12 Sept. Partly cloudy
Partly cloudy
 12° /-1° 7 mm 4.5 cm
13 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 7° /-2° 10.2 mm 2.6 cm
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-3° 4 mm 1.8 cm
15 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 8° /-3° 0 mm 0 cm
16 Sept. Patchy rain possible
Patchy rain possible
 9° /-4° 0.2 mm 0 cm
17 Sept. Partly cloudy
Partly cloudy
 11° /-1° 0.8 mm 0.2 cm
18 Sept. Moderate rain
Moderate rain
 12° /-1° 11.1 mm 0 cm
19 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 11° /-1° 5.9 mm 0 cm
20 Sept. Light rain shower
Light rain shower
 11° /-1° 0.7 mm 0 cm
21 Sept. Light rain shower
Light rain shower
 10° /0° 1.5 mm 0 cm
22 Sept. Light rain shower
Light rain shower
 10° /-1° 11.7 mm 0 cm
23 Sept. Light sleet showers
Light sleet showers
 6° /-2° 14.1 mm 0 cm
24 Sept. Partly cloudy
Partly cloudy
 7° /-4° 6.5 mm 0 cm
25 Sept. Sunny
Sunny
 11° /-2° 0.4 mm 0 cm
26 Sept. Sunny
Sunny
 11° /0° 3 mm 0 cm
27 Sept. Sunny
Sunny
 12° /0° 7.4 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.
Change Month
‹
›

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 15° and colder nights, dipping below -2°.
How much rainfall should be expected in St. Moritz during September?
Significant rainfall exceeding 274.9 mm is expected in St. Moritz during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
Will it snow in St. Moritz in September 2025?
St. Moritz typically sees 33.3 cm of snowfall during September.
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 💧

Quick links

More St. Moritz weather pages
You are here
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.

Found a mistake?
We appreciate your attention to details. Tell us here.