Terrebonne Parish Climate
Terrebonne Parish, Louisiana
Avg Annual Temp
69.6°F
Annual Precip
65.4"
Annual Snowfall
0.0"
Extreme Heat Days
76.1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Terrebonne Parish Weather
Deep South coastal warmth
Terrebonne Parish is one of the warmest spots in the U.S., with an annual average temperature of 69.6°F. Its location on the Gulf of Mexico creates a consistently warm and moist climate.
Exceeding Louisiana temperature norms
The parish’s 69.6°F average is well above the state norm of 67.0°F. Its coastal position keeps it warmer on average than almost any other parish in the state.
Similar to St. Mary
Terrebonne shares an identical 69.6°F average with neighboring St. Mary Parish. It is slightly wetter, however, receiving 65.4 inches of rain annually compared to St. Mary’s 61.9 inches.
Long summers and no snow
July averages 82.7°F, and the parish sees 76 days where the temperature exceeds 90°F. Winters are exceptionally mild, averaging 55.7°F with absolutely zero snowfall.
Water management is key
With 65.4 inches of annual rain and a 55.7°F average winter, heavy winter coats are rarely needed, but waterproof gear is essential. Homes require significant ventilation to combat the high humidity of the coastal summer.
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.