St. Martin Parish Climate
St. Martin Parish, Louisiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
67.8°F
Annual Precip
66.6"
Annual Snowfall
0.0"
Extreme Heat Days
70
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
6,776
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. Martin Parish
Climate Verdict
St. Martin Parish has a warm, averaging 67.8°F year-round, very wet conditions receiving 66.6 inches of precipitation annually, significant summer heat with 69.85 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 51.9°F. summers are hot, with July averaging 81.5°F. The climate is remarkably stable year-round, with only a 30°F difference between January and July. January is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for St. Martin Parish. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
St. Martin Parish closely matches the Louisiana statewide average temperature of 67.0°F, it is also noticeably wetter, receiving 5.8 inches more precipitation than the state average.
Climate Profile
About St. Martin Parish Weather
A subtropical Louisiana climate
With an average annual temperature of 67.8°F, St. Martin Parish is much warmer than the typical U.S. county. This area experiences the high humidity and heavy rainfall characteristic of the Gulf Coast region.
Following the state temperature curve
The parish matches the Louisiana state average closely, coming in at 67.8°F versus the 67.0°F state baseline. It remains consistently warmer than the northern parishes while avoiding the absolute peak heat of the deep coast.
Wetter than nearby St. Landry
St. Martin Parish is significantly wetter than its neighbor St. Landry, receiving 66.6 inches of rain compared to 61.4 inches. Temperature-wise, both parishes stay within a fraction of a degree of each other year-round.
Mild winters and humid summers
Extreme heat hits 70 days per year here, which is notably lower than some inland neighbors. July temperatures average 81.5°F, while winter remains comfortable with a 53.8°F average and zero snow.
Invest in moisture management
Because the parish receives 66.6 inches of rain—well above the state average of 60.8—drainage and moisture control are top priorities for homeowners. Outdoor activities should be planned for the 53.8°F winter months to avoid the 70 days of extreme heat.
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.