Jefferson Parish Climate
Jefferson Parish, Louisiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
69.7°F
Annual Precip
64.3"
Annual Snowfall
0.0"
Extreme Heat Days
85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
7,382
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jefferson Parish
Climate Verdict
Jefferson Parish has a warm, averaging 69.7°F year-round, very wet conditions receiving 64.3 inches of precipitation annually, significant summer heat with 84.76666666666667 days annually above 90°F, virtually no measurable snowfall. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 53.6°F. summers are hot, with July averaging 83.3°F. The climate is remarkably stable year-round, with only a 30°F difference between January and July.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Jefferson Parish closely matches the Louisiana statewide average temperature of 67.0°F, it is somewhat wetter than average for Louisiana.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.