The climate in Grand-Bourg during March can be summarized as hot, humid and a little damp.
March is in the spring in Grand-Bourg and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 21°C (70°F) is normal.
| Daytime temperature | 28.9°C 84°F | 
|---|---|
| Nightly temperature | 21.1°C 70°F | 
| Average temperature | 25°C 77°F | 
| Daily sunshine | 8 hrs | 
| Avg rainfall | 99 mm 3.9 ins | 
| Rainy days | 14 days | 
| Sea temperature | 26.5°C 79.8°F | 
| Humidity | 76% | 
| Windspeed | 19.1kph 12 mph | 
On average March is the 2nd driest month of the year in Grand-Bourg with around 99mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 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 March 2025.
| Hottest month: | July | 30.5°C 86.9°F | 
|---|---|---|
| Driest month: | February | 84mm 3.3ins | 
| Sunniest month: | April | 8.6hrs | 
| Coldest month: | January | 28.2°C 82.8°F | 
| Wettest month: | November | 278mm 10.9ins |