Knoxville, TN Weather
Knoxville hourly forecast: next 24 hours
Today's high of 96°F (36°C) is about 10°F (6°C) above the typical August high of 86°F (30°C).
Current conditions in detail
Knoxville weather tomorrow (Tuesday, August 18)
Tomorrow in Knoxville looks sunny, with a high of 93° and an overnight low of 71°. Rain is unlikely (7% chance). Winds top out near 6 mph, and the UV index reaches 9 (very high).
Knoxville 14-day forecast
About the weather in Knoxville
Knoxville has a humid subtropical climate, marked by hot, humid summers and generally mild winters. Average daytime highs range from about 47°F (9°C) in January to around 88°F (31°C) in July, and the city records roughly 134 days of measurable precipitation a year.
Knoxville weather: quick facts
- Hottest month: July - highs near 88°F (31°C)
- Coldest month: January - highs near 47°F (9°C)
- Record high: 100°F (38°C) · Record low: -1°F (-18°C) (2015–2024)
- Wettest month: February (12 rainy days) · Sunniest: June (11.9 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
- Snow: about 4 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 70°F (21°C). The coolest month is January, with typical highs of 47°F (9°C) and lows around 31°F (0°C). Based on 2015–2024 weather data, temperatures have reached as high as 100°F (38°C) and dropped as low as -1°F (-18°C).
Rain, sun and snow
February is usually the wettest month. It brings about 6.0 inches (152 mm) of rain over 12 days, while October is the driest. June brings the most sunshine, averaging 11.9 hours of sun a day. Snow falls on about 4 days in a typical year, mostly from December through February.
Season by season
Spring (March through May)
Spring in Knoxville is mild and warm, with daytime highs averaging 69°F (21°C) and nights around 49°F (9°C); expect showers on roughly 35 days across the season.
Summer (June through August)
Summer in Knoxville runs hot, with daytime highs averaging 87°F (30°C) and nights around 68°F (20°C); expect showers on roughly 40 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 Knoxville brings comfortable warmth, with daytime highs averaging 72°F (22°C) and nights around 53°F (11°C); expect showers on roughly 24 days across the season.
Winter (December through February)
Winter in Knoxville runs cold, with daytime highs averaging 51°F (11°C) and nights around 34°F (1°C); expect showers on roughly 35 days across the season, plus around 4 snowy days.
Average temperatures in Knoxville by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 47° | 31° | 12 | 4.4 in | 6.2 h/day | 73% |
| February | 54° | 35° | 12 | 6.0 in | 6.4 h/day | 73% |
| March | 61° | 41° | 12 | 5.1 in | 8.1 h/day | 70% |
| April | 69° | 48° | 11 | 4.4 in | 9.8 h/day | 69% |
| May | 78° | 58° | 12 | 3.8 in | 10.8 h/day | 72% |
| June | 85° | 66° | 12 | 3.3 in | 11.9 h/day | 69% |
| July | 88° | 70° | 15 | 4.0 in | 11.7 h/day | 73% |
| August | 86° | 69° | 13 | 4.3 in | 11.1 h/day | 74% |
| September | 83° | 64° | 9 | 3.4 in | 10.1 h/day | 70% |
| October | 72° | 53° | 7 | 3.2 in | 9.0 h/day | 71% |
| November | 60° | 41° | 8 | 3.5 in | 7.5 h/day | 72% |
| December | 53° | 36° | 11 | 5.1 in | 5.8 h/day | 77% |