Chalmette, LA climate
Chalmette has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 91°, a January night drops to 44°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decade5° warmer than normal today. The forecast high is 89°, and a typical Sep 30 in Chalmette peaks around 84°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Chalmette feels like
Winter
Spring
Summer
Fall
Chalmette 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 | 62° | 44° | 5.3" | 0 | 8 | 0 | 46° – 60° |
| February | 66° | 48° | 4.3" | 0 | 7 | 0 | 48° – 67° |
| March | 72° | 54° | 4.8" | 0 | 7 | 0 | 57° – 70° |
| April | 78° | 60° | 5.1" | 0 | 4 | 0 | 64° – 73° |
| May | 84° | 67° | 5.1" | 0 | 6 | 0 | 72° – 79° |
| June | 89° | 73° | 6.9" | 0 | 11 | 0 | 79° – 84° |
| July | 91° | 75° | 7.7" | 0 | 12 | 0 | 81° – 85° |
| August | 91° | 75° | 6.5" | 0 | 10 | 0 | 80° – 86° |
| September | 87° | 72° | 5.4" | 0 | 9 | 0 | 77° – 83° |
| October | 80° | 62° | 3.7" | 0 | 5 | 0 | 67° – 76° |
| November | 71° | 52° | 3.8" | 0 | 6 | 0 | 56° – 66° |
| December | 64° | 47° | 4.7" | 0 | 7 | 0 | 49° – 63° |
| Year | 78° | 61° | 63.2" | 0.0" | 92 | 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 Chalmette
Chalmette gets 63 inches of rain and melted snow a year. July is the wettest month and October the driest. Rain or snow falls on about 92 days a year.
About 309 frost-free days a year
In half of years the last 32° night comes by February 10 and the first one by December 17. That leaves about 309 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Chalmette
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Chalmette, 29% of that work is heating and 71% 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.
Chalmette and its neighbors
Chalmette borders 3 towns with climate data. January nights across them vary by 0.5°. New Orleans has the coldest January nights (44°) and Arabi the hottest July afternoons (91°). Chalmette’s January low is 44° and its July high 91°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Chalmette 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 Chalmette averaged 0.9° warmer than the 1900s. The biggest change is in February (+1.3°). The shift is smaller than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Chalmette’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 48° to 67°. July is the most reliable, staying within 4°.
Common questions about Chalmette’s climate
What is the coldest month in Chalmette?
January, with a typical high of 62° and a low of 44°.
What is the hottest month in Chalmette?
August, with a typical high of 91° and a low of 75°. About 119 days a year reach 90°.
How much snow does Chalmette get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Chalmette?
In half of years the first 32° night comes by December 17, and the last spring frost by February 10.
What is the rainiest month in Chalmette?
July, with 7.7 inches of rain and melted snow. The year totals 63 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Chalmette itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Chalmette, LA (2 mi, snow) and Chalmette, LA (1 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.