St. James Parish weather, town by town
13 places in St. James Parish, Louisiana, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
St. James Parish Weather Facts
St. James Parish has 13 places on myweatherrock (11 census-designated places, 2 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 105°F at Donaldsonville 4 Sw on August 28, 2023. The coldest night is 3°F at Donaldsonville 4 Sw on February 13, 1899. The wettest day brought 15.16 inches of rain at Thibodaux 4 Se on June 7, 2001. The biggest single-day snow measured 14.02 inches at Thibodaux 4 Se on February 14, 1895. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Union, about 10 square miles.
About St. James Parish weather
The map on the Now tab shows every St. James Parish town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 13 St. James Parish towns with station normals, the warmest month is July, when the day usually reaches 91°F, and the coldest is January, when the night usually falls to 42°F. July is the wettest, with rain on about 14 days.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
St. James Parish weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about St. James Parish weather
- What is the hottest temperature recorded at a St. James Parish station?
- 105°F at Donaldsonville 4 Sw on August 28, 2023, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a St. James Parish station?
- 3°F at Donaldsonville 4 Sw on February 13, 1899.
- What is the most rain a St. James Parish station has measured in one day?
- 15.16 inches at Thibodaux 4 Se on June 7, 2001.
- What is the biggest one-day snowfall at a St. James Parish station?
- 14.02 inches at Thibodaux 4 Se on February 14, 1895.
- How many St. James Parish towns have a weather page here?
- 13: 11 census-designated places, 2 towns. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the St. James Parish forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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