Grande-Synthe Weather in September
What's the weather like in Grande-Synthe (Nord-Pas-de-Calais) in September 2024?
The climate in Grande-Synthe during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Grande-Synthe and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 11°C (51°F) is normal.
| Daytime temperature | 18.8°C 65.8°F |
|---|---|
| Nightly temperature | 10.8°C 51.4°F |
| Average temperature | 14.8°C 58.6°F |
| Daily sunshine | 5.6 hrs |
| Avg rainfall | 64 mm 2.5 ins |
| Rainy days | 15 days |
| Sea temperature | 17.4°C 63.3°F |
| Humidity | 82% |
| Windspeed | 15.9kph 10 mph |
On average September is the 3rd wettest month of the year in Grande-Synthe with around 64mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
September temperatures in Grande-Synthe
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 Grande-Synthe in September 2024.
Other monthly averages
Best places to visit in September
Grande-Synthe weather stats
| Hottest month: | August | 20.8°C 69.4°F |
|---|---|---|
| Driest month: | February | 39mm 1.5ins |
| Sunniest month: | August | 7.8hrs |
| Coldest month: | January | 5.9°C 42.6°F |
| Wettest month: | November | 81mm 3.2ins |
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