Planning for the weather is an important factor for making your trip to Belle Chasse a success, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 15°C. The rainiest months in Belle Chasse are August, July, June and September, with each month seeing an average of 181 mm of rainfall.