Lafourche Parish Climate
Lafourche Parish, Louisiana
Avg Annual Temp
69.8°F
Annual Precip
68.9"
Annual Snowfall
0.0"
Extreme Heat Days
65.85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Lafourche Parish Weather
Extreme Subtropical Warmth and Rain
Lafourche Parish averages 69.8°F annually, which is significantly higher than the national median. It is also one of the wettest places in the U.S., receiving 68.9 inches of precipitation per year.
Louisiana's Warmest and Wettest
The parish temperature of 69.8°F sits well above the state average of 67.0°F. Furthermore, its 68.9 inches of rainfall far surpasses the Louisiana state average of 60.8 inches.
Matching the New Orleans Area
Lafourche Parish shares a nearly identical temperature profile with neighboring Jefferson Parish at roughly 69.7°F. However, Lafourche is wetter, receiving about 4.6 inches more rain annually than its neighbor.
Mild Winters and 66 Heat Days
Despite its high average temp, the parish has 66 days over 90°F, which is lower than inland parishes due to Gulf breezes. Winters are exceptionally mild with an average January temperature of 54.0°F and no snow.
Prepare for Heavy Rainfall
With 68.9 inches of rain, residents must prioritize flood mitigation and high-quality waterproof gear. The humidity is constant, so dehumidifiers are often necessary to protect indoor air quality and property.
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.