Grande-Synthe Weather in May

In Grande-Synthe, May brings moderate daytime temperatures around 18°C (64°F), with nights cooling to 10°C (50°F). Some rainfall is to be expected.

Rainfall in Grande-Synthe in May

Historically, May sees about 15 days of rain, with a monthly average of 60 mm (2.4 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Grande-Synthe in May

Daytime highs in Grande-Synthe in May reach 18°C (64°F), with nights around 10°C (50°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Grande-Synthe in May

The city usually sees around 220 hours of sunlight, indicating many sunny days — a great month for sightseeing.

For Grande-Synthe itself, June, July, August and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
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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 May

Min Temperature 10°C (50°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 51%  

Precipitation 60 mm (2.4 in)  

Rainy days 15 days  

Humidity 84% *  

Sunshine 220 hours *  

Percentage Sunshine *  

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

What to Wear in Grande-Synthe in May

Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Grande-Synthe in May

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

Cycling

6/10

Walking

6/10

Camping

4/10

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.