St. James Parish Climate
St. James Parish, Louisiana
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
69.5°F
Annual Precip
66.2"
Annual Snowfall
—
Extreme Heat Days
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Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. James Parish
Climate Verdict
Climate data for St. James Parish is currently being compiled from NOAA sources. Check back soon for detailed weather normals.
Seasonal Breakdown
Seasonal weather data for this county is based on regional climate patterns. Residents experience typical weather variations for their location, with conditions reflecting broader state and regional trends. Consult the NOAA Climate Data Online for detailed seasonal breakdowns as more granular station data becomes available.
Outdoor & Gardening Guidance
Growing season and gardening guidance for St. James Parish will be added as data becomes available.
Regional Context
Comparative climate data for St. James Parish is being processed.
Climate Profile
About St. James Parish Weather
Abundant Rainfall and Tropical Influence
St. James Parish experiences 66.2 inches of annual precipitation, which is exceptionally high by national standards. This heavy rainfall is a core feature of its humid subtropical climate.
One of Louisiana's Wettest Areas
The parish averages 66.2 inches of rain, surpassing the Louisiana state average of 60.8 inches. It sits in a pocket of high precipitation along the lower Mississippi River.
Regional Leaders in Precipitation
St. James is slightly wetter than St. Charles Parish (66.0 inches) and St. Helena Parish (65.6 inches). It is one of the dampest jurisdictions in the entire state.
Year-Round Damp and Tropical Conditions
With over 66 inches of rain and no recorded annual snowfall, the seasons transition between warm-wet and cool-damp. Summer months typically see the most frequent heavy rainfall events.
Focus on Drainage and Waterproofing
Effective landscape drainage is a priority for managing the 66.2 inches of annual rainfall. Residents should choose moisture-resistant building materials for any new construction or renovations.
Frequently Asked Questions
What is the average temperature in St. James Parish?
How much rain does St. James Parish get?
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How cold are winters in St. James Parish?
Track your own weather in St. James Parish
Ambient Weather personal weather stations give you hyperlocal climate data.
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Data sources: ERA5 Reanalysis (modeled) via Open-Meteo (gap-filled where station data unavailable).. 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.