McDonough, GA climate
McDonough has mild winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 34°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in McDonough feels like
Winter
Spring
Summer
Fall
McDonough 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 | 54° | 34° | 4.7" | 0.5" | 11 | 0 | 36° – 51° |
| February | 59° | 36° | 4.8" | 0 | 11 | 0 | 39° – 57° |
| March | 67° | 43° | 5.0" | 0.1" | 10 | 0 | 49° – 64° |
| April | 75° | 49° | 4.0" | 0 | 9 | 0 | 57° – 67° |
| May | 82° | 58° | 3.2" | 0 | 8 | 0 | 65° – 75° |
| June | 88° | 66° | 4.6" | 0 | 11 | 0 | 72° – 81° |
| July | 90° | 69° | 4.7" | 0 | 11 | 0 | 77° – 83° |
| August | 89° | 69° | 4.4" | 0 | 10 | 0 | 76° – 83° |
| September | 84° | 62° | 3.9" | 0 | 8 | 0 | 70° – 80° |
| October | 75° | 51° | 3.4" | 0 | 7 | 0 | 60° – 68° |
| November | 65° | 41° | 3.9" | 0 | 8 | 0 | 47° – 58° |
| December | 56° | 36° | 4.8" | 0.2" | 10 | 0 | 37° – 56° |
| Year | 74° | 51° | 51.3" | 0.8" | 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 McDonough
McDonough gets 51 inches of rain and melted snow a year. March is the wettest month and May the driest. Rain or snow falls on about 113 days a year.
About 220 frost-free days a year
In half of years the last 32° night comes by March 31 and the first one by November 6. That leaves about 220 frost-free days for gardens, longer than 82% of U.S. towns.
Heating and cooling a home in McDonough
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In McDonough, 61% of that work is heating and 39% 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 McDonough 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 McDonough averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.0°). The shift is smaller than in 86% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at McDonough’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 37° to 56°. July is the most reliable, staying within 6°.
Common questions about McDonough’s climate
What is the coldest month in McDonough?
January, with a typical high of 54° and a low of 34°.
What is the hottest month in McDonough?
July, with a typical high of 90° and a low of 69°. About 74 days a year reach 90°.
How much snow does McDonough get?
Almost none. A normal year brings 0.8 inches.
When is the first frost in McDonough?
In half of years the first 32° night comes by November 6, and the last spring frost by March 31.
What is the rainiest month in McDonough?
March, with 5.0 inches of rain and melted snow. The year totals 51 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for McDonough itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Jonesboro, GA (13 mi, snow) and Mcdonough 5 Ene, GA (7 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.