St. John the Baptist Parish Climate
St. John the Baptist Parish, Louisiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
69.1°F
Annual Precip
67.2"
Annual Snowfall
0.0"
Extreme Heat Days
79
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
7,171
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. John the Baptist Parish
Climate Verdict
St. John the Baptist Parish has a warm, averaging 69.1°F year-round, very wet conditions receiving 67.2 inches of precipitation annually, significant summer heat with 78.5 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 52.6°F. summers are hot, with July averaging 83.2°F. The 31°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for St. John the Baptist Parish. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
St. John the Baptist Parish closely matches the Louisiana statewide average temperature of 67.0°F, it is also noticeably wetter, receiving 6.4 inches more precipitation than the state average.
Climate Profile
About St. John the Baptist Parish Weather
Intense Warmth and Extreme Precipitation
St. John the Baptist Parish is significantly warmer and wetter than the national median, averaging 69.1°F and 67.2 inches of rain. This combination creates a truly tropical environment.
Surpassing State Heat and Rain Averages
The parish temperature of 69.1°F and rainfall of 67.2 inches both exceed the Louisiana state averages of 67.0°F and 60.8 inches. It is one of the state's warmest and dampest locales.
Warmer and Wetter Than Neighbors
The parish is warmer than St. Bernard (68.6°F) and wetter than St. James (66.2 inches). It sits at the heart of a very high-precipitation coastal corridor.
Tropical Summers and Snow-Free Winters
Residents face 79 days of heat at or above 90°F, while winters remain quite warm with a 54.8°F average. Snowfall is non-existent, reflecting the parish's deep southern location.
Prioritize Cooling and Storm Prep
With 79 extreme heat days and 67.2 inches of rain, high-capacity HVAC and storm shutters are essential. Constant humidity management is required to protect homes from moisture damage.
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.