Williamson, GA climate
Williamson 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 Williamson feels like
Winter
Spring
Summer
Fall
Williamson 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 | 55° | 34° | 4.7" | 0.2" | 9 | 0 | 37° – 51° |
| February | 59° | 37° | 4.8" | 0 | 7 | 0 | 40° – 58° |
| March | 67° | 43° | 5.1" | 0.1" | 7 | 0 | 49° – 64° |
| April | 75° | 49° | 4.0" | 0 | 6 | 0 | 58° – 67° |
| May | 82° | 58° | 3.3" | 0 | 6 | 0 | 65° – 75° |
| June | 87° | 66° | 4.6" | 0 | 9 | 0 | 72° – 81° |
| July | 90° | 69° | 4.9" | 0 | 10 | 0 | 76° – 82° |
| August | 89° | 68° | 4.3" | 0 | 7 | 0 | 75° – 82° |
| September | 84° | 63° | 3.8" | 0 | 6 | 0 | 70° – 79° |
| October | 75° | 52° | 3.2" | 0 | 5 | 0 | 60° – 68° |
| November | 65° | 41° | 3.9" | 0 | 6 | 0 | 48° – 58° |
| December | 57° | 37° | 4.9" | 0 | 8 | 0 | 38° – 57° |
| Year | 74° | 51° | 51.5" | 0.3" | 88 | 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 Williamson
Williamson gets 52 inches of rain and melted snow a year. March is the wettest month and October the driest. Rain or snow falls on about 88 days a year.
About 239 frost-free days a year
In half of years the last 32° night comes by March 20 and the first one by November 13. That leaves about 239 frost-free days for gardens, longer than 88% of U.S. towns.
Heating and cooling a home in Williamson
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Williamson, 59% of that work is heating and 41% 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 Williamson 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 Williamson averaged 0.7° warmer than the 1900s. The biggest change is in February (+1.8°). The shift is smaller than in 92% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Williamson’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 57°. July is the most reliable, staying within 6°.
Common questions about Williamson’s climate
What is the coldest month in Williamson?
January, with a typical high of 55° and a low of 34°.
What is the hottest month in Williamson?
July, with a typical high of 90° and a low of 69°. About 39 days a year reach 90°.
How much snow does Williamson get?
Almost none. A normal year brings 0.3 inches.
When is the first frost in Williamson?
In half of years the first 32° night comes by November 13, and the last spring frost by March 20.
What is the rainiest month in Williamson?
March, with 5.1 inches of rain and melted snow. The year totals 52 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Williamson itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Thomaston 4se, GA (22 mi, snow) and Experiment, 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.