Bay Saint Louis Weather in March

The climate in Bay Saint Louis during March can be summarized as mild and wet.

March is in the spring in Bay Saint Louis and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 20°C (69°F), whilst at night 10°C (49°F) is normal.

On average March is the 6th wettest month of the year in Bay Saint Louis with around 138mm 5.4 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 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 Bay Saint Louis in March 2025.