The climate in Rotselaar during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Rotselaar and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 11°C (51°F) is normal.
| Daytime temperature | 19.7°C 67.5°F |
|---|---|
| Nightly temperature | 10.5°C 50.9°F |
| Average temperature | 15.1°C 59.2°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 59 mm 2.3 ins |
| Rainy days | 14 days |
| Sea temperature | 17.9°C 64.2°F |
| Humidity | 79% |
| Windspeed | 13kph 8 mph |
On average September is the 3rd driest month of the year in Rotselaar with around 59mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
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 Rotselaar in September 2025.
Best places to visit in September
| Hottest month: | July | 22.7°C 72.9°F |
|---|---|---|
| Driest month: | February | 52mm 2ins |
| Sunniest month: | August | 7.5hrs |
| Coldest month: | January | 4.6°C 40.3°F |
| Wettest month: | June | 78mm 3.1ins |