Grand Bay, AL climate
Grand Bay has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 41°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Grand Bay feels like
Winter
Spring
Summer
Fall
Grand Bay 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° | 5.4" | 0 | 10 | 0 | 44° – 58° |
| February | 65° | 45° | 4.2" | 0 | 9 | 0 | 46° – 65° |
| March | 71° | 51° | 5.1" | 0.1" | 9 | 0 | 55° – 69° |
| April | 77° | 56° | 5.3" | 0 | 8 | 0 | 62° – 71° |
| May | 84° | 64° | 5.1" | 0 | 8 | 0 | 71° – 77° |
| June | 89° | 71° | 6.6" | 0 | 12 | 0 | 77° – 83° |
| July | 90° | 73° | 7.8" | 0 | 15 | 0 | 79° – 83° |
| August | 90° | 72° | 7.1" | 0 | 13 | 0 | 78° – 84° |
| September | 87° | 69° | 5.9" | 0 | 9 | 0 | 76° – 82° |
| October | 80° | 58° | 4.0" | 0 | 7 | 0 | 65° – 74° |
| November | 70° | 48° | 4.1" | 0 | 8 | 0 | 54° – 64° |
| December | 64° | 43° | 4.9" | 0.1" | 9 | 0 | 47° – 61° |
| Year | 77° | 57° | 65.5" | 0.2" | 117 | 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 Grand Bay
Grand Bay gets 66 inches of rain and melted snow a year. July is the wettest month and October the driest. Rain or snow falls on about 117 days a year.
About 269 frost-free days a year
In half of years the last 32° night comes by March 1 and the first one by November 24. That leaves about 269 frost-free days for gardens, longer than 93% of U.S. towns.
Heating and cooling a home in Grand Bay
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Grand Bay, 37% of that work is heating and 63% 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.
How Grand Bay 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 Grand Bay averaged 0.8° warmer than the 1900s. The biggest change is in March (+1.3°). The shift is smaller than in 86% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Grand Bay’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 65°. July is the most reliable, staying within 4°.
Common questions about Grand Bay’s climate
What is the coldest month in Grand Bay?
January, with a typical high of 62° and a low of 41°.
What is the hottest month in Grand Bay?
August, with a typical high of 90° and a low of 72°. About 80 days a year reach 90°.
How much snow does Grand Bay get?
Almost none. A normal year brings 0.2 inches.
When is the first frost in Grand Bay?
In half of years the first 32° night comes by November 24, and the last spring frost by March 1.
What is the rainiest month in Grand Bay?
July, with 7.8 inches of rain and melted snow. The year totals 66 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Grand Bay itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mobile, AL (16 mi, snow) and Pascagoula Lott Intl Airport, MS (11 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.