17.09
thu
thu
Day
55°F
SE 5 mph
Precip.
13%
13%
Night
63°F
N 4 mph
Precip.
16%
16%
18.09
fri
fri
Day
57°F
SE 2 mph
Precip.
13%
13%
Night
61°F
NE 2 mph
Precip.
9%
9%
19.09
sat
sat
Day
55°F
S 4 mph
Precip.
11%
11%
Night
63°F
N 4 mph
Precip.
13%
13%
20.09
sun
sun
Day
59°F
SE 2 mph
Precip.
10%
10%
Night
66°F
N 4 mph
Precip.
19%
19%
21.09
mon
mon
Day
52°F
SW 6 mph
Precip.
55%
55%
Night
59°F
SW 2 mph
Precip.
10%
10%
22.09
tue
tue
Day
57°F
SW 7 mph
Precip.
4%
4%
Night
59°F
NW 2 mph
Precip.
10%
10%
23.09
wed
wed
Day
52°F
SE 2 mph
Precip.
8%
8%
Night
59°F
NE 2 mph
Precip.
14%
14%
sea water
temperature
temperature
| St Gallen |
monthly
weather
weather
| St Gallen |
current
weather
weather
| St Gallen |
14 days
forecast
forecast
| St Gallen |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 71.3°F. The highest and lowest sea temperatures during the month were 73.4°F and 68.4°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 57.9°F. The highest and lowest sea temperatures during the month were 63.1°F and 53.1°F.
Air temperature in St Gallen, °F
Precipitation total in St Gallen, in.
* Charts above show average data for the last 3 years.
Best time for vacation in St Gallen
St Gallen on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
St Gallen
Local time: 18:33
September 17, thursday
2100
64°F
N
5 mph
5 mph
September 18, friday
0000
63°F
N
4 mph
4 mph
0300
61°F
NE
4 mph
4 mph
0600
59°F
NE
1 mph
1 mph
0900
52°F
SE
2 mph
2 mph
1200
57°F
SE
2 mph
2 mph
1500
61°F
S
2 mph
2 mph
1800
61°F
SW
2 mph
2 mph
