Grand Isle Weather in October

The climate in Grand Isle during October can be summarized as warm, humid and a little damp.

October is in the fall / autumn in Grand Isle and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (80°F), whilst at night 16°C (61°F) is normal.

On average October is the driest month of the year in Grand Isle with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 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 Isle in October 2025.