Monthly Historical AveragesGrand Isle, LA
Average Temperature
High
18°
Feels 17
Low
13°
Feels 11
Average Precipitation
9 Days
75.8mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, December 28, 2025
Day
22°Feels 22
Wind
21 km/h S
Gust
32 km/h
Humidity
83%
P.O.P
40%
Rain
<1 mm
Night
16°Feels 13
Wind
17 km/h SW
Gust
26 km/h
Humidity
93%
P.O.P
40%
Rain
<1 mm
Historical AveragesDec 28
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity