Grande-Synthe Weather & Climate: Best Time to Visit

Grande-Synthe, Nord-Pas-de-Calais, France, sees big temperature differences between seasons, with August peaking at 23°C (73°F) and January dropping to 8°C (46°F).

Grande-Synthe sees a moderate amount of rainfall, totalling around 762 mm (30 in) per year. The most sunshine falls in July, with an average of 7.7 hours of daily sunshine.

Monthly Temperature in Grande-Synthe

Visitors to Grande-Synthe can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 23°C (73°F) in August, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.

At night, you can expect temperatures ranging from 15°C (59°F) in August to around 3°C (37°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Grande-Synthe

Generally, Grande-Synthe experiences moderate precipitation patterns, averaging 762 mm (30 in) yearly. Year-round, Grande-Synthe has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 75 mm (3 in), and the driest month, April, with 52 mm (2 in), is minimal. For more details, please visit our Grande-Synthe Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Sunshine Hours in Grande-Synthe

Seasonal changes in sunshine hours are quite dramatic in Grande-Synthe. While July receives considerable daily sunshine with up to 7.7 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.6 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

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

Daily hours of sunshine

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

Humidity in Grande-Synthe by Month

The city experiences its highest humidity in December, reaching 93%. In May, the humidity drops to its lowest level at 84%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

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

Grande-Synthe 3-Day Forecast

10-Day Forecast

Select a Month

Check the conditions for any month of the year.

Best Time to Visit Grande-Synthe

During June, July, August and September, Grande-Synthe experiences its most favorable weather, with temperatures between 20°C (68°F) and 23°C (73°F). These mild conditions make it an excellent time for a visit.

The weather does bring rainfall during this period, between 60 mm (2.4 in) and 70 mm (2.8 in).

Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.