Chattanooga, TN Climate & Monthly Averages
The climate of Chattanooga
Located in Tennessee, United States, Chattanooga experiences a humid subtropical climate with hot, humid summers and generally mild winters. Afternoon temperatures peak near 88°F (31°C) in July and dip to about 50°F (10°C) in January, with around 57.4 inches (1458 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: July - highs near 88°F (31°C)
- Coldest month: January - highs near 50°F (10°C)
- Record high: 99°F (37°C) · Record low: 5°F (-15°C) (2015–2024)
- Wettest month: February (13 rainy days) · Sunniest: June (11.6 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
- Snow: about 2 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 88°F (31°C) and overnight lows stay near 71°F (22°C). The coolest month is January, with typical highs of 50°F (10°C) and lows around 33°F (1°C). Based on 2015–2024 weather data, temperatures have reached as high as 99°F (37°C) and dropped as low as 5°F (-15°C).
Rain, sun and snow
February is usually the wettest month. It brings about 6.3 inches (160 mm) of rain over 13 days, while October is the driest. June brings the most sunshine, averaging 11.6 hours of sun a day. Snowfall is rare but not unheard of.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 50° | 33° | 10 | 5.3 in | 6.5 h/day | 74% |
| February | 56° | 37° | 13 | 6.3 in | 6.3 h/day | 74% |
| March | 63° | 43° | 13 | 6.1 in | 8.0 h/day | 71% |
| April | 70° | 49° | 11 | 5.1 in | 9.7 h/day | 70% |
| May | 79° | 59° | 11 | 4.1 in | 10.8 h/day | 73% |
| June | 85° | 67° | 14 | 4.1 in | 11.6 h/day | 74% |
| July | 88° | 71° | 16 | 5.0 in | 11.5 h/day | 76% |
| August | 87° | 70° | 14 | 4.5 in | 10.7 h/day | 75% |
| September | 83° | 65° | 8 | 3.8 in | 10.0 h/day | 71% |
| October | 73° | 54° | 8 | 3.7 in | 8.9 h/day | 72% |
| November | 62° | 44° | 9 | 3.7 in | 7.5 h/day | 73% |
| December | 54° | 38° | 11 | 5.6 in | 5.9 h/day | 78% |
Chattanooga month by month
Chattanooga weather in January
January brings highs around 50°F (10°C), lows near 33°F (1°C), about 10 wet days - typically the coldest month of the year in Chattanooga.
Chattanooga weather in February
February brings highs around 56°F (13°C), lows near 37°F (3°C), about 13 wet days - typically the wettest month of the year in Chattanooga.
Chattanooga weather in March
March brings highs around 63°F (17°C), lows near 43°F (6°C), about 13 wet days.
Chattanooga weather in April
April brings highs around 70°F (21°C), lows near 49°F (10°C), about 11 wet days.
Chattanooga weather in May
May brings highs around 79°F (26°C), lows near 59°F (15°C), about 11 wet days.
Chattanooga weather in June
June brings highs around 85°F (30°C), lows near 67°F (19°C), about 14 wet days - typically the sunniest month of the year in Chattanooga.
Chattanooga weather in July
July brings highs around 88°F (31°C), lows near 71°F (22°C), about 16 wet days - typically the hottest month of the year in Chattanooga.
Chattanooga weather in August
August brings highs around 87°F (31°C), lows near 70°F (21°C), about 14 wet days.
Chattanooga weather in September
September brings highs around 83°F (28°C), lows near 65°F (18°C), about 8 wet days.
Chattanooga weather in October
October brings highs around 73°F (23°C), lows near 54°F (12°C), about 8 wet days - typically the driest month of the year in Chattanooga.
Chattanooga weather in November
November brings highs around 62°F (16°C), lows near 44°F (6°C), about 9 wet days.
Chattanooga weather in December
December brings highs around 54°F (12°C), lows near 38°F (4°C), about 11 wet days.
Seasons in Chattanooga
Spring (March through May)
Spring in Chattanooga brings comfortable warmth, with daytime highs averaging 70°F (21°C) and nights around 50°F (10°C); expect showers on roughly 35 days across the season.
Summer (June through August)
Summer in Chattanooga is hot, with daytime highs averaging 87°F (30°C) and nights around 69°F (21°C); expect showers on roughly 43 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Fall (September through November)
Fall in Chattanooga is mild and warm, with daytime highs averaging 73°F (23°C) and nights around 54°F (12°C); expect showers on roughly 25 days across the season.
Winter (December through February)
Winter in Chattanooga is brisk and cold, with daytime highs averaging 53°F (12°C) and nights around 36°F (2°C); expect showers on roughly 34 days across the season.
Climate questions, answered
What is the average temperature in Chattanooga?
Is Chattanooga hot in summer?
Is Chattanooga cold in winter?
How many rainy days does Chattanooga get in a year?
Best time to visit Chattanooga
The best time to visit Chattanooga is generally September to November and April to May, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 73°F (23°C).
Pack for Chattanooga with lightweight, breathable clothing and strong sun protection for the hot months; a warm jacket and layers for the cooler season; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 71°F (22°C).
Chattanooga temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.