Knoxville, TN weather in July
Expect hot, oppressively humid weather with frequent rain in Knoxville in July, with highs near 88°F and lows near 66°F. Rain falls on about 12 days. It is one of the warmest months in Knoxville.
- Normal high
- 88°F
- Normal low
- 66°F
- Wet days
- 12
- 5.8 in total
- Muggy days
- 25
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 88°F | 88°F |
| Normal low | 65°F | 66°F |
| Chance of a wet day | 36% | 37% |
| Sunrise / sunset | 6:22 am / 8:56 pm | 6:42 am / 8:41 pm |
| Daylight | 14.6 h | 14.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am70°Fdew point 67°F
- 9 am77°Fdew point 69°F
- Noon83°Fdew point 68°F
- 3 pm86°Fdew point 67°F
- 6 pm84°Fdew point 67°F
- 9 pm77°Fdew point 68°F
NOAA hourly normals (local standard time) from Knoxville Mcghee Tyson Airport (11 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more12 of 31
- Muggy daysdaily mean dew point 65°F or more25 of 31
- Wet daysat least 0.01 in of rain or melted snow12 of 31
- Notable rainat least 0.10 in9 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 5.8 in; a dry July brings about 4.1 in and a wet one about 7.2 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How July varies from year to year
- Warmest July, 1991-20201993: average high 94°F
- Coolest July2009: average high 84°F
- Wettest July1999: 10.2 in
- Driest July1995: 1.4 in
- Highest reading105°F (July 1, 2012)
- Lowest reading53°F (July 30, 2014)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 86°F | 88°F | 88°F |
| Normal low | 62°F | 66°F | 65°F |
| Wet days | 11 | 12 | 10 |
| Comfortable days | 3 | 0 | 0 |
| Daylight | 14.6 h | 14.3 h | 13.5 h |
Highs change by +2°F from June and 0°F into August.
Nearby alternatives in July
- Warmer: Augusta, GA208 mi · high 94°F · 11 wet days
- Cooler: Gatlinburg, TN29 mi · high 83°F · 15 wet days
How Knoxville ranks in July
- Normal high175th warmest of 378 cities; 6th of 7 in Tennessee
- Wet days314th driest of 378
- Comfortable days223rd most of 340
What to pack for Knoxville in July
- Light, breathable clothing – highs near 88°F and about 25 muggy days
- A rain jacket or umbrella – rain on about 12 days
- Sunglasses and sunscreen – about 14.3 hours of daylight and highs near 88°F
Heating and cooling
July has 0 heating degree days and 380 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How hot is Knoxville in July?
The normal high is 88°F and the normal low is 66°F. From 1991 to 2020 the hottest July reading was 105°F (July 1, 2012).
Does it rain a lot in Knoxville in July?
About 12 days in July have at least 0.01 in of precipitation, and the normal total is 5.8 in. The wettest July in 1991-2020 was in 1999 (10.2 in); the driest was in 1995 (1.4 in).
Is July a good time to visit Knoxville?
July ranks 10th of 12 months on our comfort score for Knoxville (44 out of 100). It has almost no comfortable days and about 12 days at 90°F or hotter. The best months are April and October.
Where the numbers come from
- Temperature, rain and frost dates: Knoxville Exp Stn (USC00404946), 4.8 mi SSW of the city center, 830 ft (69 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall, snow depth and humidity and wind by hour: Knoxville Mcghee Tyson Airport (USW00013891), 11 mi SSW of the city center, 962 ft (63 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Mc Ghee Tyson Airport (723260-13891), 11 mi SSW of the city center, 970 ft (71 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).