Grand Isle Weather in December

What's the weather like in Grand Isle (Louisiana) in December 2022?

The climate in Grand Isle during December can be summarized as mild and damp.

December is in the winter in Grand Isle and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 18°C (65°F), whilst at night 9°C (48°F) is normal.

Grand Isle weather averages (imperial / metric)
Daytime temperature 18.4°C 65.1°F
Nightly temperature 8.6°C 47.5°F
Average temperature 13.5°C 56.3°F
Daily sunshine 6.4 hrs
Avg rainfall 114 mm 4.5 ins
Rainy days 9 days
Sea temperature 20.1°C 68.2°F
Humidity 77%
Windspeed 15kph 9 mph

On average December is the 4th driest month of the year in Grand Isle with around 114mm 4.5 inches of rain making it a damp 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 6.4 hours of sunshine per day.

December temperatures in Grand Isle

Grand Isle average temperature in December

December rainfall

Grand Isle average rain in December

December hourly sunshine

Grand Isle average rain in December

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 December 2022.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Grand Isle weather stats

Grand Isle weather statistics
Hottest month: July 32.1°C 89.8°F
Driest month: October 82mm 3.2ins
Sunniest month: April 9.7hrs
Coldest month: January 16.3°C 61.3°F
Wettest month: August 169mm 6.7ins
Map showing location of Grand Isle (29.23662, -89.98729)

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