St. James Parish Climate
St. James Parish, Louisiana
Climate data coming soon
Avg Annual Temp
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Annual Precip
66.2"
Annual Snowfall
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Extreme Heat Days
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Monthly Temperature
Temperature data coming soon
Precipitation Calendar
Seasonal Overview
Seasonal data coming soon
National Comparison
Data pending
Data pending
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
How much rain does St. James Parish get?
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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.