Measurements:
°C
°F
St Moritz
32°F
S 6 mph
Feels like: 26°F
Precip: 0%
World Resorts Switzerland St Moritz Weather September Weather in St Moritz

St Moritz Weather: September

Average Day Temperature: 52.3°F
Average Night Temperature: 31.9°F
Number of Sunny Days: 9 days
Sunshine Hours: 11.7 - 13.3 hours
Number of Rainy Days: 6 days
Precipitation Totals: 4.1 in

Air Temperature in September, °F

Select Year: 2025 2024 2023
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
12
24
36
48
60
72
84
96
Day Temperature   
Night Temperature

The highest day temperature in September 2025 was 72°F. The lowest night temperature was 19°F. The average values for day and night temperatures during September were 52.5°F и 34.1°F respectivly.

Sunny, Cloudy and Gloomy days
Sunny days
Cloudy days
Gloomy days
30%
33%
37%

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in September, in

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
1.2
2.4
3.6
4.7
5.9
7.1
8.3

Precipitation total in September for St Moritz is 4.1 in.

Wind Speed in September, mph
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
1.0
2.1
3.1
4.2
5.2
6.3
7.3

The average wind speed in September is 5.2 mph. This value is relatively stable throughout the year.

Average Sunny Hours Per Day
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
1.4
2.7
4.1
5.4
6.8
8.1
9.5
10.8

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for St Moritz in September is 6.3 hours.

Best Time to Visit St Moritz
The most sunny months:
December 10 days
October 9 days
August 9 days
The most warm months:
August 61.0 °F
July 60.8 °F
June 56.9 °F
The most cold months:
January 19.0 °F
December 20.8 °F
February 23.3 °F
The most rainy months:
July 13 days
June 12 days
August 11 days
The most windy months:
January 6 mph
February 6 mph
December 6 mph

St Moritz on the Weather Map

Switzerland Resorts:
NAME
Basle +50
Berne +46
Geneva +48
Gstaad +36
Lake Geneva +54
Lausanne +54
Lucerne +46
Lugano +44
Montreux +44
Spitz +50
St Gallen +50
Verbier +40
Vevey +44
Winterthur +48
Zurich +48
24 Hours Weather Forecast
St Moritz
Local time: 02:20
09 oct, thursday
0300 32°F
S
6 mph
0600 30°F
S
6 mph
0900 44°F
S
7 mph
1200 48°F
S
6 mph
1500 48°F
S
7 mph
1800 38°F
S
6 mph
2100 32°F
S
6 mph
10 oct, friday
0000 28°F
S
6 mph