Weather in Heidelberg: September
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Average day temperature: | 68.4°F |
| Average night temperature: | 55.0°F | |
 |
Number of sunny days: | 13 days |
| Day length: | 11.7 - 13.5 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.5 in. | |
| more information | ||
14 days
forecast
forecast
| Heidelberg |
weather in
October
October
| Heidelberg |
Air temperature in September, °F
Show year:
2026
2025
2024
The highest day temperature during September of 2026 was 80°F. At the same time the lowest night temperature was 49°F. Daily and nightly averages during September were 69.9°F and 58.0°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in September is almost equal.
Precipitation total in September, in.
Precipitation total value in Heidelberg in September is 1.4 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 5.5 mph It makes September one of the least windy months 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: 6.9.
Best time for vacation in Heidelberg
Heidelberg on a weather map
Places in Germany:
Name
°F
24 Hours Forecast
Heidelberg
Local time: 10:46
October 05, monday
1200
68°F
NE
2 mph
2 mph
1500
72°F
E
3 mph
3 mph
1800
66°F
SE
3 mph
3 mph
2100
55°F
W
3 mph
3 mph
October 06, tuesday
0000
55°F
W
3 mph
3 mph
0300
52°F
W
2 mph
2 mph
0600
52°F
W
2 mph
2 mph
0900
57°F
W
2 mph
2 mph
