Knoxville, TN weather in April
Knoxville is mild in April, with frequent rain: highs average 71°F and nights drop to about 44°F. Expect about 11 wet days. A great month for outdoor plans.
- Normal high
- 71°F
- Normal low
- 44°F
- Wet days
- 11
- 5.3 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 66°F | 75°F |
| Normal low | 39°F | 49°F |
| Chance of a wet day | 39% | 37% |
| Sunrise / sunset | 7:21 am / 7:57 pm | 6:44 am / 8:21 pm |
| Daylight | 12.6 h | 13.6 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 April day
- 6 am51°Fdew point 45°F
- 9 am58°Fdew point 47°F
- Noon65°Fdew point 47°F
- 3 pm68°Fdew point 46°F
- 6 pm67°Fdew point 46°F
- 9 pm61°Fdew point 46°F
NOAA hourly normals (local standard time) from Knoxville Mcghee Tyson Airport (11 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F17 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow11 of 30
- Notable rainat least 0.10 in8 of 30
- Freezing nightslow 32°F or below3 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain in April
Normal precipitation is 5.3 in; a dry April brings about 3.4 in and a wet one about 6.7 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 1 an inch or more. Snow is very rare.
How April varies from year to year
- Warmest April, 1991-20202017: average high 76°F
- Coolest April1997: average high 66°F
- Wettest April1998: 11.8 in
- Driest April2002: 2.0 in
- Highest reading90°F (April 30, 2017)
- Lowest reading21°F (April 8, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 61°F | 71°F | 79°F |
| Normal low | 36°F | 44°F | 54°F |
| Wet days | 13 | 11 | 12 |
| Comfortable days | 12 | 17 | 11 |
| Daylight | 12.0 h | 13.1 h | 14.1 h |
Highs change by +10°F from March and +8°F into May.
Nearby alternatives in April
- Warmer: Augusta, GA208 mi · high 79°F · 8 wet days
- Drier: Augusta, GA208 mi · high 79°F · 8 wet days
- Cooler: Fayetteville, WV212 mi · high 65°F · 13 wet days
How Knoxville ranks in April
- Normal high171st warmest of 378 cities; 6th of 7 in Tennessee
- Wet days259th driest of 378
- Comfortable days42nd most of 340
What to pack for Knoxville in April
- Layers – afternoons near 71°F but nights near 44°F
- A rain jacket or umbrella – rain on about 11 days
Frost in April
The last spring frost typically comes around Apr 11; in 1 year in 10 it comes after Apr 29. All frost dates for Knoxville.
Heating and cooling
April has 252 heating degree days and 21 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Knoxville in April?
The normal high is 71°F and the normal low is 44°F. From 1991 to 2020 the hottest April reading was 90°F (April 30, 2017).
Does it rain a lot in Knoxville in April?
About 11 days in April have at least 0.01 in of precipitation, and the normal total is 5.3 in. The wettest April in 1991-2020 was in 1998 (11.8 in); the driest was in 2002 (2.0 in).
Is April a good time to visit Knoxville?
April ranks 1st of 12 months on our comfort score for Knoxville (71 out of 100). It has about 17 comfortable days. 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).