Climate averages 1991–2020
Knoxville weather
in July.
A hot, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Knoxville: daytime highs average 29.8°C and nights cool to about 20.5°C. By daytime temperature it is the warmest month of the year.
Expect about 119 mm of rain on roughly 15 days, which makes July a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 21 min on an average July day.
The nearest other city in this atlas is Asheville (130 km away). In July its highs average 27.8°C, 2.0°C cooler than Knoxville, with 99 mm of rain.
Among the 498 cities listed in the United States, Knoxville ranks joint 271st of 498 for the warmest July highs and 458th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Knoxville is 0.5°C cooler than that mean.
From July to August, average highs fall by 0.4°C to 29.4°C, and monthly rainfall falls from 119 mm to 86 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Knoxville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.3°C-0.6°C | -0.6°C | 111 | 10.7 | 10.010 h |
| February | 10.6°C0.8°C | 0.8°C | 110 | 10.9 | 10.911 h |
| March | 15.0°C4.2°C | 4.2°C | 123 | 12.2 | 11.912 h |
| April | 20.0°C8.8°C | 8.8°C | 109 | 10.9 | 13.113 h |
| May | 24.1°C13.8°C | 13.8°C | 94 | 11.7 | 14.014 h |
| June | 28.3°C18.3°C | 18.3°C | 93 | 13.2 | 14.615 h |
| July, selected | 29.8°C20.5°C | 20.5°C | 119 | 14.8 | 14.314 h |
| August | 29.4°C19.9°C | 19.9°C | 86 | 11.4 | 13.514 h |
| September | 26.7°C16.8°C | 16.8°C | 90 | 8.3 | 12.412 h |
| October | 20.9°C10.5°C | 10.5°C | 74 | 7.7 | 11.311 h |
| November | 14.6°C4.5°C | 4.5°C | 96 | 8.9 | 10.310 h |
| December | 9.9°C1.2°C | 1.2°C | 117 | 10.6 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Asheville in JulyUnited States · 130 kmHigh 27.8°C · Low 18.1°C · 99 mm rain
- East Chattanooga in JulyUnited States · 156 kmHigh 30.7°C · Low 21.4°C · 105 mm rain
- Chattanooga in JulyUnited States · 162 kmHigh 30.9°C · Low 21.6°C · 105 mm rain
- Johns Creek in JulyUnited States · 216 kmHigh 30.8°C · Low 21.8°C · 104 mm rain
- Roswell in JulyUnited States · 219 kmHigh 30.5°C · Low 21.5°C · 104 mm rain
- Murfreesboro in JulyUnited States · 223 kmHigh 31.1°C · Low 21.8°C · 112 mm rain
- Athens, United States in JulyUnited States · 228 kmHigh 31.6°C · Low 22.0°C · 102 mm rain
- Sandy Springs in JulyUnited States · 230 kmHigh 30.6°C · Low 21.5°C · 108 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Knoxville) is explained once on the Knoxville year overview and on the Sources, method and limits page.