Knoxville weather in July

In July, Knoxville sees average daytime highs of 86°F and overnight lows near 70°F, with 4.7 in of rain across 14.8 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 86°F through the month. The sky is clear or mostly clear about 30% of the time in July, and the air most often feels muggy.

Daylight stretches from about 14 h 24 min at the start of July to 13 h 54 min by month's end. Set against the rest of the year, July is Knoxville's 6th-clearest and 11th-windiest month. For the whole year in context, see Knoxville's year-round climate.

Daytime high
86°
1st warmest
Overnight low
70°
12th coldest
Rainfall
4.7 in
14.8 wet days
Daylight
14 h 12 min
5:35 AM – 7:48 PM
Cloud cover
59%
6th clearest
Wind
4 mph
11th windiest
Solar energy
5.87 kWh/m²
Travel score
4.4
out of 10

Knoxville is city and county seat of Knox County, State of Tennessee, United States.

Density
707/km²
people per km²
Founded
1786

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 86°F through the month.

A typical July day in Knoxville reaches about 86°F in the afternoon and slips back to 70°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 92°F. Set against its neighbours, July runs about 2°F warmer than June and on par with August.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18669
28669
38669
48669
58669
68669
78669
88669
98670
108670
118670
128670
138670
148670
158670
168670
178670
188670
198670
208670
218670
228670
238670
248670
258670
268670
278670
288670
298670
308669
318669

How July really feels in Knoxville

Once humidity and wind are folded in, July averages 20 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
20
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Knoxville weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan47° / 31°4.410.71.89.81.6
Feb52° / 34°4.310.91.710.62.6
Mar60° / 41°4.912.20.711.74.6
Apr69° / 49°4.310.9012.96.2
May77° / 58°3.711.7013.96.5
Jun84° / 66°3.713.2014.45.2
Jul86° / 70°4.714.8014.24.4
Aug86° / 68°3.411.4013.44.9
Sep81° / 62°3.58.3012.26.7
Oct70° / 50°2.97.8011.17.0
Nov59° / 40°3.88.90.210.14.7
Dec50° / 35°4.610.619.62.3

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25149
35149
45149
55149
65149
75149
85149
95248
105149
115149
125149
135248
145149
155149
165149
175149
185149
195050
205149
215149
225149
235149
245149
255149
265248
275248
285248
295248
305248
315347

Chance of precipitation in July

Any precipitation

Knoxville gets around 4.7 in of rain over 14.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 49% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
147
246
346
446
546
646
746
846
946
1046
1146
1246
1347
1447
1547
1648
1748
1848
1948
2049
2149
2249
2349
2448
2548
2648
2748
2847
2947
3046
3146

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the muggy band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1372050210
2361950220
3261851230
4261850250
5251749260
6251649270
7251649280
8251549300
9241548310
10141447330
11141447340
12141346360
13141345370
14141244390
15141243400
16141142410
17131142421
18131141431
19131140441
20131140451
21131139451
22131139451
23131139451
24131139451
25131240441
26141240431
27141340411
28041341410
29041442400
30141443390
31141443380

Wind in July

Winds average 4 mph in July.

Across July, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 24 min at the start of July to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 5:27 AM to 5:46 AM, and sunset from 7:51 PM to 7:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:277:51
214.45:277:51
314.45:277:51
414.45:287:51
514.45:287:51
614.45:297:51
714.45:297:51
814.35:307:51
914.35:307:50
1014.35:317:50
1114.35:327:50
1214.35:327:49
1314.35:337:49
1414.35:337:49
1514.25:347:48
1614.25:357:48
1714.25:357:47
1814.25:367:47
1914.25:377:46
2014.15:377:46
2114.15:387:45
2214.15:397:45
2314.15:407:44
2414.15:407:43
2514.05:417:43
2614.05:427:42
2714.05:437:41
2814.05:437:40
2913.95:447:40
3013.95:457:39
3113.95:467:38

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.87 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 6.07 kWh/m² in June across the year — July's 5.87 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Intense
86.0Intense
96.0Bright
106.0Bright
116.0Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Is July a good time to visit Knoxville?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.4
Sightseeing
9th-best month of the year
6.1
Beach & pool
4th-best month of the year

July is a reasonable time to visit Knoxville for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Knoxville in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Knoxville sees daytime highs around 86°F and nights near 70°F. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Knoxville in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Knoxville peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 12UV 10Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Knoxville in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Knoxville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Dec 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar11Good
Apr11Good
May13Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov9Good
Dec7Good
Location & terrain

Where is Knoxville?

Knoxville sits at 36.0°N, 83.9°W, 906 ft above sea level, in United States. The nearest listed city is Farragut, 14 mi away.

Topography around Knoxville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Knoxville.

Within 2 miles, the terrain around Knoxville has only modest variations in elevation — a maximum elevation change of 390 ft around an average of 919 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 879 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,974 ft.

The land around Knoxville is covered by artificial surfaces (45%) and trees (39%) within 2 miles, trees (65%) and grassland (21%) within 10 miles, and trees (79%) within 50 miles.

2 miles
390 ft
10 miles
879 ft
50 miles
5,974 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Farragut 14 mi · Maryville 14 mi · Oak Ridge 20 mi · Sevierville 21 mi · Gatlinburg 29 mi · Morristown 39 mi · Greeneville 63 mi · Cleveland 77 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Knoxville (35.9606°, -83.9207°, elevation 906 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).