St. Landry Parish Climate
St. Landry Parish, Louisiana
Avg Annual Temp
68.0°F
Annual Precip
61.5"
Annual Snowfall
0.0"
Extreme Heat Days
102.15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About St. Landry Parish Weather
Warmer than the national average
St. Landry Parish records an average annual temperature of 68.0°F, significantly higher than the national median of approximately 55°F. This humid subtropical climate stays warm throughout the year with very little variation in cold extremes.
Slightly warmer than state norms
The parish's 68.0°F annual average sits one full degree above the Louisiana state average of 67.0°F. While Louisiana is famously warm, St. Landry typically experiences more intense heat than many of its northern peers.
Climate matching the Acadiana region
St. Landry is nearly identical in temperature to neighboring St. Martin Parish, which averages 67.8°F. However, St. Landry receives slightly less rain, recording 61.4 inches annually compared to St. Martin’s 66.6 inches.
A long, grueling summer season
Summer averages reach a stifling 81.8°F, fueled by a staggering 102 days per year where temperatures hit 90°F or higher. Winters are mild with a 53.2°F average and absolutely no recorded annual snowfall.
Prepare for heat and humidity
Residents must maintain high-efficiency HVAC systems to handle over 100 extreme heat days each year. With 61.4 inches of annual rainfall, heavy-duty gutter systems and rain gear are essential for local storms.
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.