Grand-Bourg Weather & Climate: Best Time to Visit

The temperature in Grand-Bourg remains steady throughout the year, providing a consistently comfortable climate. Average daytime temperatures reach a comfortable 29°C (84°F) in September. In February, the coolest month of the year, temperatures drop to a comfortable 27°C (81°F).

At night, temperatures range from around 26°C (79°F) in September to 24°C (75°F) in February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Grand-Bourg has a relatively rainy climate with high precipitation levels, averaging 1222 mm (48 in) of rainfall annually. Grand-Bourg can be quite wet during October, receiving approximately 155 mm (6.1 in) of precipitation over 19 rainy days.

In contrast, during the driest month (March), you will experience much drier conditions, with 46 mm (1.8 in) of precipitation spread across 14 rainy days days. For more details, please visit our Grand-Bourg Precipitation page.

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

The average number of days each month with precipitation

Grand-Bourg experiences moderate variation in sunshine hours across the seasons. With 8.2 hours daily sunshine in April, it dips to 6.3 hours in December, offering a balanced mix of sunny and overcast days.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Grand-Bourg.

The city experiences its highest humidity in November, reaching 74%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year