Chattanooga Valley, GA climate
Chattanooga Valley has mild winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 31°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Chattanooga Valley feels like
Winter
Spring
Summer
Fall
Chattanooga Valley 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 | 50° | 31° | 5.0" | 0 | 8 | 0 | 32° – 48° |
| February | 55° | 34° | 5.1" | 0 | 8 | 0 | 35° – 53° |
| March | 63° | 40° | 5.2" | 0 | 9 | 0 | 45° – 61° |
| April | 73° | 47° | 4.8" | 0 | 8 | 0 | 55° – 65° |
| May | 80° | 56° | 4.2" | 0 | 8 | 0 | 63° – 73° |
| June | 86° | 64° | 4.1" | 0 | 8 | 0 | 71° – 79° |
| July | 89° | 68° | 4.3" | 0 | 8 | 0 | 75° – 83° |
| August | 89° | 67° | 3.8" | 0 | 7 | 0 | 73° – 84° |
| September | 84° | 61° | 4.1" | 0 | 6 | 0 | 69° – 79° |
| October | 73° | 49° | 3.8" | 0 | 5 | 0 | 57° – 66° |
| November | 62° | 38° | 4.5" | 0 | 7 | 0 | 44° – 55° |
| December | 53° | 34° | 5.3" | 0 | 7 | 0 | 34° – 53° |
| Year | 71° | 49° | 54.0" | 0.0" | 89 | 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 Chattanooga Valley
Chattanooga Valley gets 54 inches of rain and melted snow a year. December is the wettest month and August the driest. Rain or snow falls on about 89 days a year.
About 232 frost-free days a year
In half of years the last 32° night comes by March 25 and the first one by November 9. That leaves about 232 frost-free days for gardens, longer than 86% of U.S. towns.
Heating and cooling a home in Chattanooga Valley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Chattanooga Valley, 64% of that work is heating and 36% 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 Chattanooga Valley 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 Chattanooga Valley averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.0°). The shift is smaller than in 81% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Chattanooga Valley’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 34° to 53°. July is the most reliable, staying within 8°.
Common questions about Chattanooga Valley’s climate
What is the coldest month in Chattanooga Valley?
January, with a typical high of 50° and a low of 31°.
What is the hottest month in Chattanooga Valley?
July, with a typical high of 89° and a low of 68°. About 37 days a year reach 90°.
How much snow does Chattanooga Valley get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Chattanooga Valley?
In half of years the first 32° night comes by November 9, and the last spring frost by March 25.
What is the rainiest month in Chattanooga Valley?
December, with 5.3 inches of rain and melted snow. The year totals 54 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Chattanooga Valley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Chickamauga Park, GA (4 mi, snow) and Chickamauga 2 Sw, GA (5 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.