Mannheim Weather in September
What's the weather like in Mannheim (Baden-Württemberg Region) in September 2025?
The climate in Mannheim during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Mannheim and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 10°C (51°F) is normal.
| Daytime temperature | 21°C 69.8°F |
|---|---|
| Nightly temperature | 10.4°C 50.7°F |
| Average temperature | 15.7°C 60.3°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 50 mm 2 ins |
| Rainy days | 12 days |
| Sea temperature | 19.5°C 67.1°F |
| Humidity | 74% |
| Windspeed | 7.9kph 5 mph |
On average September is the 6th driest month of the year in Mannheim with around 50mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
September temperatures in Mannheim
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mannheim in September 2025.
Other monthly averages
Best places to visit in September
Mannheim weather stats
| Hottest month: | July | 24.7°C 76.5°F |
|---|---|---|
| Driest month: | February | 43mm 1.7ins |
| Sunniest month: | August | 7.6hrs |
| Coldest month: | January | 3.4°C 38.1°F |
| Wettest month: | June | 74mm 2.9ins |
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