Grande-Synthe Weather in September

Grande-Synthe in September sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 13°C (55°F). Rainfall is fairly high this month at around 64 mm (2.5 in), so pack a rain jacket to stay dry.

Rainfall in Grande-Synthe in September

Rain is expected on roughly 15 days, totalling around 64 mm (2.5 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Grande-Synthe in September

The temperature in Grande-Synthe in September is perfect. Daytime highs reach 20°C (68°F), with nights dropping to 13°C (55°F). September is part of summer. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Grande-Synthe in September

The month experiences a moderate amount of sunlight, with 160 hours of sunshine. This provides a nice balance between sunshine and clouds.

If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Grande-Synthe.

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For a detailed overview over the year and the best time to visit France, check out our Grande-Synthe's climate page.

Grande-Synthe Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 51%  

Precipitation 64 mm (2.5 in)  

Rainy days 15 days  

Humidity 86% *  

Sunshine 160 hours *  

Percentage Sunshine *  

* Data from: Ostend, Belgium (44 KM, 27 Miles).

What to Wear in Grande-Synthe in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Grande-Synthe in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

10/10

Walking

10/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit France, check out our Grande-Synthe's climate page.

More climate data for Grande-Synthe

Temperature Rainfall Sunshine Humidity

See the full Grande-Synthe climate overview or explore weather in France.