Port Allen, LA climate
Port Allen has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 92°, a January night drops to 41°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Port Allen feels like
Winter
Spring
Summer
Fall
Port Allen 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° | 41° | 6.2" | 0 | 10 | 0 | 44° – 58° |
| February | 66° | 45° | 4.8" | 0 | 9 | 0 | 46° – 64° |
| March | 73° | 50° | 4.5" | 0 | 9 | 0 | 56° – 70° |
| April | 79° | 57° | 5.1" | 0 | 8 | 0 | 62° – 72° |
| May | 86° | 64° | 5.6" | 0 | 8 | 0 | 72° – 78° |
| June | 90° | 71° | 6.4" | 0 | 12 | 0 | 78° – 83° |
| July | 92° | 73° | 5.9" | 0 | 13 | 0 | 80° – 85° |
| August | 92° | 73° | 6.1" | 0 | 12 | 0 | 79° – 85° |
| September | 89° | 68° | 4.5" | 0 | 9 | 0 | 76° – 82° |
| October | 81° | 57° | 4.7" | 0 | 7 | 0 | 65° – 75° |
| November | 71° | 48° | 4.1" | 0 | 8 | 0 | 54° – 64° |
| December | 64° | 43° | 5.3" | 0.2" | 10 | 0 | 46° – 61° |
| Year | 79° | 57° | 63.1" | 0.2" | 114 | 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 Port Allen
Port Allen gets 63 inches of rain and melted snow a year. June is the wettest month and November the driest. Rain or snow falls on about 114 days a year.
About 276 frost-free days a year
In half of years the last 32° night comes by February 25 and the first one by November 26. That leaves about 276 frost-free days for gardens, longer than 93% of U.S. towns.
Heating and cooling a home in Port Allen
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Port Allen, 35% of that work is heating and 65% 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.
Port Allen and its neighbors
Port Allen borders 1 town with climate data. January nights across them vary by 0.0°. Baton Rouge has both the coldest January nights (41°) and the hottest July afternoons (92°). Port Allen’s January low is 41° and its July high 92°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Port Allen 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 Port Allen averaged 0.7° warmer than the 1900s. The biggest change is in February (+1.3°). The shift is smaller than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Port Allen’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 46° to 64°. July is the most reliable, staying within 5°.
Common questions about Port Allen’s climate
What is the coldest month in Port Allen?
January, with a typical high of 62° and a low of 41°.
What is the hottest month in Port Allen?
July, with a typical high of 92° and a low of 73°. About 96 days a year reach 90°.
How much snow does Port Allen get?
Almost none. A normal year brings 0.2 inches.
When is the first frost in Port Allen?
In half of years the first 32° night comes by November 26, and the last spring frost by February 25.
What is the rainiest month in Port Allen?
June, with 6.4 inches of rain and melted snow. The year totals 63 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Port Allen itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Baton Rouge Ryan Airport, LA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.