Measurements:
°C
°F
Winterthur
48°F
NW 1 mph
Feels like: 48°F
Precip: 0%
World Resorts Switzerland Winterthur Weather September Weather in Winterthur

Winterthur Weather: September

Average Day Temperature: 69.5°F
Average Night Temperature: 49.7°F
Sea Water Temperature: 67.1°F
Number of Sunny Days: 12 days
Sunshine Hours: 11.7 - 13.4 hours
Number of Rainy Days: 4 days
Precipitation Totals: 2.4 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
14
28
42
56
70
84
98
112
Day Temperature   
Night Temperature

The highest day temperature in September 2025 was 84°F. The lowest night temperature was 43°F. The average values for day and night temperatures during September were 65.7°F и 52.3°F respectivly.

Winterthur Water Sea 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
59
63
67
71
75
79
83

The average sea surface temperature in September 2025 for Winterthur was 69.5°F. The maximum and minimum values were 65.0°F and 73.4°F respectively.

Sunny, Cloudy and Gloomy days
Sunny days
Cloudy days
Gloomy days
40%
33%
27%

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
0.7
1.3
2.0
2.6
3.3
4.0
4.6

Precipitation total in September for Winterthur is 2.4 in.

Wind Speed in September, mph
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.0
0.9
1.8
2.7
3.5
4.4
5.3
6.2

The average wind speed in September is 4.0 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
1.6
3.2
4.8
6.4
8.0
9.6
11.2

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 Winterthur in September is 7.5 hours.

Best Time to Visit Winterthur
The most sunny months:
August 15 days
July 13 days
April 12 days
The most warm months:
August 78.9 °F
July 78.9 °F
June 76.6 °F
Warmest sea temperature:
August 72.1 °F
July 71.4 °F
September 67.1 °F
The most cold months:
January 36.7 °F
December 38.2 °F
February 40.8 °F
The most rainy months:
May 7 days
June 7 days
July 7 days
The most windy months:
March 5 mph
May 5 mph
April 5 mph

Winterthur 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
Winterthur
Local time: 02:20
09 oct, thursday
0300 48°F
NW
1 mph
0600 50°F
S
1 mph
0900 54°F
S
1 mph
1200 58°F
S
2 mph
1500 58°F
SW
5 mph
1800 56°F
SW
4 mph
2100 52°F
SW
3 mph
10 oct, friday
0000 48°F
SW
4 mph