Chattanooga, TN Weather
Chattanooga hourly forecast: next 24 hours
Today's high of 92°F (33°C) is about 9°F (5°C) above the typical September high of 83°F (28°C).
Current conditions in detail
Chattanooga weather tomorrow (Wednesday, September 16)
Tomorrow in Chattanooga looks sunny, with a high of 93° and an overnight low of 72°. Rain is unlikely (4% chance). Winds top out near 4 mph, and the UV index reaches 8 (very high).
Chattanooga 14-day forecast
About the weather in 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.
Chattanooga weather: 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.
Season by season
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.
Average temperatures in Chattanooga by month
| 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% |