Chaumont-Gistoux Weather in September
What's the weather like in Chaumont-Gistoux (Walloon Region) in September 2025?
The climate in Chaumont-Gistoux during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Chaumont-Gistoux and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 10°C (51°F) is normal.
| Daytime temperature | 19.5°C 67°F |
|---|---|
| Nightly temperature | 10.4°C 50.6°F |
| Average temperature | 14.9°C 58.8°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 57 mm 2.2 ins |
| Rainy days | 14 days |
| Sea temperature | 17.9°C 64.2°F |
| Humidity | 80% |
| Windspeed | 13kph 8 mph |
On average September is the 3rd driest month of the year in Chaumont-Gistoux with around 57mm 2.2 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.
September temperatures in Chaumont-Gistoux
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 Chaumont-Gistoux in September 2025.
Other monthly averages
Best places to visit in September
Chaumont-Gistoux weather stats
| Hottest month: | July | 22.5°C 72.5°F |
|---|---|---|
| Driest month: | February | 53mm 2.1ins |
| Sunniest month: | August | 7.4hrs |
| Coldest month: | January | 4.4°C 39.9°F |
| Wettest month: | November | 76mm 3ins |
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