Chattanooga, TN Climate & Monthly Averages
The climate of Chattanooga
Expect hot, humid summers and generally mild winters in Chattanooga: that is what a humid subtropical climate means in practice. Highs peak at 88°F (31°C) in July and fall to 50°F (10°C) by January, with 9.0 hours of sun on an average day.
Climate quick facts
- Hottest month: July - highs near 88°F (31°C)
- Coldest month: January - highs near 50°F (10°C)
- Decade extremes (2015-2024): 99°F (37°C) high · 5°F (-15°C) low
- Wettest month: February (13 rainy days) · Sunniest: June (11.6 h sun/day)
- Climate type: humid subtropical
- Annual swing: 21°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 2 days a year
- Months averaging 30°C or hotter: 2
- Average humidity: 73%
Temperatures through the year
Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is April through May. January sits at the other end of the year: 50°F (10°C) by day, 33°F (1°C) at night. Warmth peaks in July: highs of 88°F (31°C), lows of 71°F (22°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 99°F (37°C) and the lowest daily minimum 5°F (-15°C). Snowfall is rare but not unheard of.
Rain, sun and snow
February is the wettest month at 6.3 inches (160 mm) over 13 days; October is the driest. June is the brightest month at 11.6 hours of sun a day, against an annual average of 9.0.
How Chattanooga compares
- Chattanooga sits close to the middle of our dataset on most measures: 61°F (16°C) as an annual average, 57.4 inches (1458 mm) of precipitation and 9.0 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 50° | 33° | 10 | 5.3 in | 6.5 h/day | 10.0 h | 33% | 74% |
| February | 56° | 37° | 13 | 6.3 in | 6.3 h/day | 10.9 h | 45% | 74% |
| March | 63° | 43° | 13 | 6.1 in | 8.0 h/day | 11.9 h | 41% | 71% |
| April | 70° | 49° | 11 | 5.1 in | 9.7 h/day | 13.0 h | 37% | 70% |
| May | 79° | 59° | 11 | 4.1 in | 10.8 h/day | 14.0 h | 37% | 73% |
| June | 85° | 67° | 14 | 4.1 in | 11.6 h/day | 14.5 h | 45% | 74% |
| July | 88° | 71° | 16 | 5.0 in | 11.5 h/day | 14.3 h | 51% | 76% |
| August | 87° | 70° | 14 | 4.5 in | 10.7 h/day | 13.5 h | 44% | 75% |
| September | 83° | 65° | 8 | 3.8 in | 10.0 h/day | 12.3 h | 27% | 71% |
| October | 73° | 54° | 8 | 3.7 in | 8.9 h/day | 11.2 h | 24% | 72% |
| November | 62° | 44° | 9 | 3.7 in | 7.5 h/day | 10.3 h | 30% | 73% |
| December | 54° | 38° | 11 | 5.6 in | 5.9 h/day | 9.8 h | 35% | 78% |
Chattanooga month by month
Average high and low for each month, with the bar showing where it sits in Chattanooga's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 10 days
- Sunshine
- 6.5 h
- Daylight
- 10.0 h
February
- Rain
- 13 days
- Sunshine
- 6.3 h
- Daylight
- 10.9 h
March
- Rain
- 13 days
- Sunshine
- 8.0 h
- Daylight
- 11.9 h
April
- Rain
- 11 days
- Sunshine
- 9.7 h
- Daylight
- 13.0 h
May
- Rain
- 11 days
- Sunshine
- 10.8 h
- Daylight
- 14.0 h
June
- Rain
- 14 days
- Sunshine
- 11.6 h
- Daylight
- 14.5 h
July
- Rain
- 16 days
- Sunshine
- 11.5 h
- Daylight
- 14.3 h
August
- Rain
- 14 days
- Sunshine
- 10.7 h
- Daylight
- 13.5 h
September
- Rain
- 8 days
- Sunshine
- 10.0 h
- Daylight
- 12.3 h
October
- Rain
- 8 days
- Sunshine
- 8.9 h
- Daylight
- 11.2 h
November
- Rain
- 9 days
- Sunshine
- 7.5 h
- Daylight
- 10.3 h
December
- Rain
- 11 days
- Sunshine
- 5.9 h
- Daylight
- 9.8 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Chattanooga
Spring (March through May)
Through spring, Chattanooga is pleasantly warm: 70°F (21°C) by day, 50°F (10°C) after dark, and rain falls on around 35 of the 90 days.
Summer (June through August)
Summer is hot here - highs near 87°F (30°C), nights near 69°F (21°C), and rain falls on around 43 of the 90 days. Daylight is generous - around 11.3 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall in Chattanooga brings comfortable warmth, 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 is brisk and cold here - highs near 53°F (12°C), nights near 36°F (2°C), and rain falls on around 34 of the 90 days.
Climate questions, answered
How much sun does Chattanooga get?
Does it rain a lot in Chattanooga?
How often does it rain in Chattanooga?
Is Chattanooga humid?
How hot does Chattanooga get in summer?
Best time to visit Chattanooga
September to November and April to May is the sweet spot for Chattanooga - warm days, manageable rainfall and plenty of daylight line up. Expect 73°F (23°C) in the afternoon and around 9 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in September.
Pack for Chattanooga with light clothing for the warm months, a warm jacket and layers for the cooler season and a compact umbrella or rain shell. July nights average 71°F (22°C), so evenings rarely match the afternoons.
Chattanooga temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.