St. Tammany Parish Climate
St. Tammany Parish, Louisiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
67.4°F
Annual Precip
64.2"
Annual Snowfall
0.1"
Extreme Heat Days
76
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
6,649
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. Tammany Parish
Climate Verdict
St. Tammany Parish has a warm, averaging 67.4°F year-round, very wet conditions receiving 64.2 inches of precipitation annually, significant summer heat with 75.63333333333334 days annually above 90°F, light snow averaging 0.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 51.1°F. summers are hot, with July averaging 81.5°F. The 30°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for St. Tammany Parish. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
St. Tammany Parish closely matches the Louisiana statewide average temperature of 67.0°F, it is somewhat wetter than average for Louisiana.
Climate Profile
About St. Tammany Parish Weather
Subtropical heat on the Northshore
St. Tammany Parish maintains an average annual temperature of 67.4°F, significantly higher than the U.S. national median. The climate is defined by high humidity and heavy annual precipitation totaling 64.2 inches.
Typical Louisiana thermal patterns
The parish sits slightly above the state average of 67.0°F. While it is cooler than the coastal parishes to the south, it still experiences 76 days of extreme heat annually.
Wetter than Tangipahoa Parish
St. Tammany is slightly warmer and wetter than its neighbor Tangipahoa, which averages 66.8°F and 63.6 inches of rain. Both parishes share a similar Northshore climate profile with nearly identical winter averages.
High humidity and rare snow
Summer averages 80.9°F with 76 days of extreme heat over 90°F. Winters are mild at 53.1°F, though the parish occasionally sees a trace of snow, averaging 0.1 inches annually.
Prepare for wet summers
With 64.2 inches of annual rain, high-capacity drainage systems are essential for local properties. Residents should plan outdoor maintenance around the 76 extreme heat days that occur mostly between June and August.
Frequently Asked Questions
What is the average temperature in St. Tammany Parish?
How much rain does St. Tammany Parish get?
Does it snow in St. Tammany Parish?
How hot does St. Tammany Parish get in summer?
How cold are winters in St. Tammany Parish?
Track your own weather in St. Tammany Parish
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.