St. James, LA climate
St. James has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 92°, a January night drops to 43°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in St. James feels like
Winter
Spring
Summer
Fall
St. James weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 63° | 43° | 5.7" | 0 | 11 | 0 | 45° – 60° |
| February | 67° | 47° | 4.3" | 0 | 9 | 0 | 47° – 66° |
| March | 73° | 51° | 4.2" | 0 | 8 | 0 | 56° – 70° |
| April | 79° | 58° | 4.8" | 0 | 7 | 0 | 64° – 73° |
| May | 86° | 65° | 5.8" | 0 | 8 | 0 | 72° – 79° |
| June | 90° | 72° | 7.1" | 0 | 12 | 0 | 79° – 83° |
| July | 92° | 74° | 6.7" | 0 | 13 | 0 | 80° – 85° |
| August | 92° | 73° | 6.9" | 0 | 13 | 0 | 79° – 85° |
| September | 89° | 69° | 5.4" | 0 | 9 | 0 | 76° – 83° |
| October | 81° | 59° | 4.4" | 0 | 7 | 0 | 66° – 75° |
| November | 72° | 49° | 4.0" | 0 | 7 | 0 | 55° – 66° |
| December | 65° | 45° | 4.8" | 0.1" | 9 | 0 | 48° – 63° |
| Year | 79° | 59° | 64.0" | 0.1" | 113 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in St. James
St. James gets 64 inches of rain and melted snow a year. June is the wettest month and November the driest. Rain or snow falls on about 113 days a year.
About 291 frost-free days a year
In half of years the last 32° night comes by February 21 and the first one by December 5. That leaves about 291 frost-free days for gardens, longer than 94% of U.S. towns.
Heating and cooling a home in St. James
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In St. James, 36% of that work is heating and 64% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
St. James and its neighbors
St. James borders 3 towns with climate data. January nights across them vary by 0.2°. Welcome has both the coldest January nights (43°) and the hottest July afternoons (92°). St. James’s January low is 43° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How St. James compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in St. James averaged 0.9° warmer than the 1900s. The biggest change is in February (+1.7°). The shift is smaller than in 77% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at St. James’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 47° to 66°. June is the most reliable, staying within 4°.
Common questions about St. James’s climate
What is the coldest month in St. James?
January, with a typical high of 63° and a low of 43°.
What is the hottest month in St. James?
July, with a typical high of 92° and a low of 74°. About 80 days a year reach 90°.
How much snow does St. James get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in St. James?
In half of years the first 32° night comes by December 5, and the last spring frost by February 21.
What is the rainiest month in St. James?
June, with 7.1 inches of rain and melted snow. The year totals 64 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for St. James itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Donaldsonville 4 Sw, LA (11 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.