Weather in Basle: September
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Average day temperature: | 69.0°F |
| Average night temperature: | 52.8°F | |
 |
Number of sunny days: | 14 days |
| Day length: | 11.7 - 13.4 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.7 in. | |
| more information | ||
14 days
forecast
forecast
| Basle |
weather in
October
October
| Basle |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 83°F. At the same time the lowest night temperature was 44°F. Daily and nightly averages during September were 65.5°F and 54.2°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Basle in September is 1.5 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 4.1 mph It makes September lest windy month of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.4.
Best time for vacation in Basle
Basle on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Basle
Local time: 08:32
December 05, friday
0900
39°F
N
2 mph
2 mph
1200
43°F
N
2 mph
2 mph
1500
43°F
N
2 mph
2 mph
1800
39°F
NW
4 mph
4 mph
2100
36°F
NW
4 mph
4 mph
December 06, saturday
0000
34°F
NW
5 mph
5 mph
0300
34°F
NW
6 mph
6 mph
0600
37°F
NW
4 mph
4 mph
