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.