Grand Isle (Outside) Weather Forecast
- 66
- 72
Rain Showers
- 63
- 71
Rain Showers
- 61
- 68
Cloudy
- 57
- 66
Mostly Cloudy
- 56
- 65
Mostly Cloudy
- 56
- 64
Mostly Sunny
- 60
- 64
Partly Sunny
Today 1 Dec Coastal Jefferson
Mostly cloudy with a chance of Thunderstorms. A chance of Showers. Patchy dense fog this afternoon. Highs in the mid 70s. South Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to 5 to 10 Mph with Gusts up to 20 Mph this afternoon. Chance of rain 50 percent.
Grand Isle (Outside) Temperature Statistics
December Temperature
Port Fourchon (18 miles)
Lowest
–Average December
–Highest
–
Climate (2018–Present)
Port Fourchon (18 miles)
Average Low 2018–2022
68.9 °FAverage 2018–2022
73.2 °FAverage High 2018–2022
77.2 °F