Mer Rouge, LA climate
Mer Rouge has mild winters and hot summers, with plenty of rain. A typical July afternoon reaches 93°, a January night drops to 36°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mer Rouge feels like
Winter
Spring
Summer
Fall
Mer Rouge 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 | 56° | 36° | 5.5" | 0 | 8 | 0 | 39° – 53° |
| February | 60° | 39° | 5.2" | 0 | 7 | 0 | 41° – 58° |
| March | 69° | 45° | 5.5" | 0.1" | 8 | 0 | 51° – 66° |
| April | 76° | 53° | 6.0" | 0 | 6 | 0 | 59° – 70° |
| May | 84° | 62° | 4.5" | 0 | 7 | 0 | 70° – 77° |
| June | 90° | 69° | 4.4" | 0 | 7 | 0 | 77° – 84° |
| July | 93° | 72° | 4.1" | 0 | 7 | 0 | 78° – 86° |
| August | 93° | 71° | 3.6" | 0 | 6 | 0 | 77° – 86° |
| September | 88° | 65° | 3.3" | 0 | 5 | 0 | 74° – 83° |
| October | 78° | 53° | 4.6" | 0 | 5 | 0 | 62° – 72° |
| November | 67° | 43° | 4.4" | 0 | 7 | 0 | 49° – 59° |
| December | 58° | 38° | 5.5" | 0 | 7 | 0 | 38° – 55° |
| Year | 76° | 54° | 56.4" | 0.1" | 81 | 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 Mer Rouge
Mer Rouge gets 56 inches of rain and melted snow a year. April is the wettest month and September the driest. Rain or snow falls on about 81 days a year.
About 241 frost-free days a year
In half of years the last 32° night comes by March 15 and the first one by November 12. That leaves about 241 frost-free days for gardens, longer than 89% of U.S. towns.
Heating and cooling a home in Mer Rouge
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mer Rouge, 56% of that work is heating and 44% is cooling.
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.
How Mer Rouge 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 Mer Rouge averaged 0.9° warmer than the 1900s. The biggest change is in February (+1.3°). The shift is smaller than in 79% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mer Rouge’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 38° to 55°. May is the most reliable, staying within 7°.
Common questions about Mer Rouge’s climate
What is the coldest month in Mer Rouge?
January, with a typical high of 56° and a low of 36°.
What is the hottest month in Mer Rouge?
August, with a typical high of 93° and a low of 71°. About 80 days a year reach 90°.
How much snow does Mer Rouge get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in Mer Rouge?
In half of years the first 32° night comes by November 12, and the last spring frost by March 15.
What is the rainiest month in Mer Rouge?
April, with 6.0 inches of rain and melted snow. The year totals 56 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mer Rouge itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Oak Ridge, LA (11 mi, snow) and Bastrop, LA (8 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.