02.09
wed
wed
Day
68°F
SE 2 mph
Precip.
10%
10%
Night
64°F
NW 2 mph
Precip.
6%
6%
03.09
thu
thu
Day
70°F
S 4 mph
Precip.
2%
2%
Night
64°F
NW 2 mph
Precip.
3%
3%
04.09
fri
fri
Day
70°F
SE 2 mph
Precip.
1%
1%
Night
70°F
N 4 mph
Precip.
3%
3%
05.09
sat
sat
Day
73°F
SW 7 mph
Precip.
10%
10%
Night
66°F
SW 3 mph
Precip.
17%
17%
06.09
sun
sun
Day
70°F
S 4 mph
Precip.
4%
4%
Night
70°F
N 2 mph
Precip.
7%
7%
07.09
mon
mon
Day
73°F
E 2 mph
Precip.
3%
3%
Night
68°F
W 1 mph
Precip.
18%
18%
08.09
tue
tue
Day
72°F
SW 5 mph
Precip.
1%
1%
Night
66°F
NW 2 mph
Precip.
9%
9%
09.09
wed
wed
Day
75°F
E 2 mph
Precip.
4%
4%
Night
68°F
N 2 mph
Precip.
5%
5%
10.09
thu
thu
Day
72°F
E 4 mph
Precip.
3%
3%
Night
64°F
NE 1 mph
Precip.
23%
23%
11.09
fri
fri
Day
66°F
E 4 mph
Precip.
3%
3%
Night
57°F
NE 1 mph
Precip.
5%
5%
12.09
sat
sat
Day
61°F
SW 6 mph
Precip.
1%
1%
Night
55°F
NW 1 mph
Precip.
6%
6%
13.09
sun
sun
Day
64°F
E 2 mph
Precip.
1%
1%
Night
61°F
N 5 mph
Precip.
4%
4%
14.09
mon
mon
Day
66°F
SW 9 mph
Precip.
7%
7%
Night
55°F
SW 17 mph
Precip.
25%
25%
15.09
tue
tue
Day
63°F
SW 16 mph
Precip.
2%
2%
Night
64°F
SW 17 mph
Precip.
2%
2%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 66.9°F. The highest and lowest sea temperatures during the month were 69.4°F and 64.0°F.
Air temperature in Geneva, °F
Precipitation total in Geneva, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Geneva
Geneva on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Geneva
Local time: 18:11
September 02, wednesday
2100
70°F
SE
2 mph
2 mph
September 03, thursday
0000
64°F
NW
2 mph
2 mph
0300
61°F
N
2 mph
2 mph
0600
59°F
N
2 mph
2 mph
0900
59°F
SW
1 mph
1 mph
1200
70°F
S
4 mph
4 mph
1500
75°F
SW
6 mph
6 mph
1800
75°F
SW
6 mph
6 mph
