The climate in Grand-Bourg during December can be summarized as hot, humid and wet.
December is in the winter in Grand-Bourg and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a steamy 29°C (84°F), whilst at night 22°C (71°F) is normal.
|Daytime temperature||29.1°C 84.3°F|
|Nightly temperature||21.6°C 70.8°F|
|Average temperature||25.3°C 77.5°F|
|Daily sunshine||6.9 hrs|
|Avg rainfall||186 mm 7.3 ins|
|Rainy days||18 days|
|Sea temperature||27.6°C 81.7°F|
|Windspeed||17.3kph 11 mph|
On average December is the 5th wettest month of the year in Grand-Bourg with around 186mm 7.3 inches of rain making it a wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.9 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grand-Bourg in December 2021.
|Hottest month:||July||30.5°C 86.9°F|
|Driest month:||February||84mm 3.3ins|
|Coldest month:||January||28.2°C 82.8°F|
|Wettest month:||November||278mm 10.9ins|