Knoxville weather in April

In April, Knoxville sees average daytime highs of 69°F and overnight lows near 49°F, with 4.3 in of rain across 10.9 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 66°F in the first days to 72°F by the end. The sky is clear or mostly clear about 31% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Knoxville's 5th-clearest and 3rd-windiest month. For the whole year in context, see Knoxville's year-round climate.

Daytime high
69°
7th warmest
Overnight low
49°
6th coldest
Rainfall
4.3 in
10.9 wet days
Daylight
12 h 54 min
6:09 AM – 7:03 PM
Cloud cover
59%
5th clearest
Wind
6 mph
3rd windiest
Solar energy
5.41 kWh/m²
Travel score
6.2
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 66°F in the first days to 72°F by the end.

A typical April day in Knoxville reaches about 69°F in the afternoon and slips back to 49°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 57°F and 80°F. Set against its neighbours, April runs about 9°F warmer than March and about 7°F cooler than May.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
16545
26646
36646
46646
56747
66747
76747
86847
96848
106848
116948
126949
136949
146949
157049
167050
177050
187050
197051
207151
217151
227151
237151
247152
257152
267252
277253
287253
297253
307353

How April really feels in Knoxville

Once humidity and wind are folded in, April averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Knoxville weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34456
44456
54555
64654
74654
84654
94654
104852
114852
124852
134852
144951
154852
164852
174852
184852
194753
204753
214654
224654
234654
244555
254654
264654
274555
284654
294654
304654

Chance of precipitation in April

Any precipitation

Knoxville gets around 4.3 in of rain over 10.9 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
339
439
539
638
737
837
936
1035
1135
1235
1334
1435
1535
1635
1736
1836
1936
2037
2137
2237
2338
2438
2539
2639
2740
2840
2941
3041

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1881020
2881020
3871120
4851230
5851230
6841330
7841330
8821440
9811540
10811540
11801640
12781750
13781750
14781750
15761860
16761860
17761860
18761860
19761860
20751870
21741970
22731980
23731980
24721990
256920101
266820111
276720121
286521131
296421141
306122161

Wind in April

Winds average 6 mph in April.

Across April, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 6:30 AM to 5:51 AM, and sunset from 6:51 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:306:51
212.46:296:51
312.46:276:52
412.56:266:53
512.56:246:54
612.56:236:55
712.66:216:56
812.66:206:56
912.66:186:57
1012.76:176:58
1112.76:166:59
1212.86:147:00
1312.86:137:01
1412.86:117:02
1512.96:107:02
1612.96:097:03
1712.96:077:04
1813.06:067:05
1913.06:057:06
2013.16:037:07
2113.16:027:08
2213.16:017:08
2313.25:597:09
2413.25:587:10
2513.25:577:11
2613.35:567:12
2713.35:547:13
2813.35:537:14
2913.45:527:14
3013.45:517:15

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.41 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 — April's 5.41 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.2Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in April

Is April a good time to visit Knoxville?

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

6.2
Sightseeing
4th-best month of the year
3.7
Beach & pool
7th-best month of the year

April is a reasonable time to visit Knoxville for sightseeing.

What to pack for Knoxville in April

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

In April, Knoxville sees daytime highs around 69°F and nights near 49°F. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

UV index in Knoxville in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. 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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).