Jefferson Parish Climate
Jefferson Parish, Louisiana
Avg Annual Temp
69.7°F
Annual Precip
64.3"
Annual Snowfall
0.0"
Extreme Heat Days
84.76666666666667
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Jefferson Parish Weather
Extreme Warmth on the Gulf Coast
Jefferson Parish is exceptionally warm, with an annual average temperature of 69.7°F that far exceeds the national median. Its annual precipitation of 64.3 inches is among the highest in the country.
One of Louisiana's Warmest Spots
The parish's average temperature of 69.7°F is nearly three degrees warmer than the Louisiana state average of 67.0°F. It also receives 64.3 inches of rain, surpassing the state's already high average of 60.8 inches.
Consistent Coastal Heat
Jefferson Parish shares nearly identical climate traits with neighboring Lafourche Parish, which averages 69.8°F. Both areas face intense moisture and frequent summer storms coming off the Gulf.
Long Summers and No Snow
The parish experiences 85 days of extreme heat over 90°F and maintains a summer average of 82.7°F. Snow is non-existent at 0.0 inches, and even January stays comfortable with an average of 53.6°F.
Plan for Heat and Humidity
Homeowners must prepare for 85 days of extreme heat with robust air conditioning and ventilation. Given the 64.3 inches of annual rain, maintaining clear drainage systems is critical for tropical weather patterns.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.