Knoxville weather in April: Knoxville, Tennessee: normal highs, lows, rain and records for April
Knoxville in April has a normal high of 71°F and a normal low of 48°F, a daily mean of 60°F, rising from 67°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 11 days in a normal April, 4.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 9°C, 120 mm of precipitation in April.
- NOAA stationKnoxville Airport
- Station IDUSW00013891
- Location35.82°N 83.99°W
- Elevation962 ft (293 m)
- From the center11 miles
- Population198,722
- Jan 48° 30°
- Feb 53° 33°
- Mar 61° 40°
- Apr 71° 48°
- May 79° 57°
- Jun 86° 65°
- Jul 88° 69°
- Aug 88° 68°
- Sep 83° 61°
- Oct 72° 49°
- Nov 60° 38°
- Dec 51° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Knoxville in April?
The normal high is 71°F and the normal low 48°F, for a daily mean of 59.6°F. April is 9.0°F warmer than March and 8.3°F cooler than May. April is the 7th warmest month of the year in Knoxville and the 6th wettest. Across the month the normal high rises 8°F, from 67°F on April 1 to 75°F on April 30. From one year to the next April's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 57°F and 62°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 67°F | 44°F | 39% | 27% |
| April 8 | 69°F | 46°F | 38% | 27% |
| April 15 | 71°F | 48°F | 38% | 26% |
| April 22 | 73°F | 50°F | 38% | 26% |
| April 30 | 75°F | 52°F | 37% | 25% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 67°F | 44°F | 39% | 27% | 12 h 30 min |
| April 2 | 67°F | 44°F | 39% | 27% | 12 h 40 min |
| April 3 | 67°F | 44°F | 39% | 27% | 12 h 40 min |
| April 4 | 68°F | 45°F | 39% | 27% | 12 h 40 min |
| April 5 | 68°F | 45°F | 39% | 27% | 12 h 40 min |
| April 6 | 68°F | 45°F | 39% | 27% | 12 h 40 min |
| April 7 | 69°F | 46°F | 38% | 27% | 12 h 50 min |
| April 8 | 69°F | 46°F | 38% | 27% | 12 h 50 min |
| April 9 | 69°F | 46°F | 38% | 27% | 12 h 50 min |
| April 10 | 70°F | 46°F | 38% | 27% | 12 h 50 min |
| April 11 | 70°F | 47°F | 38% | 26% | 13 h |
| April 12 | 70°F | 47°F | 38% | 26% | 13 h |
| April 13 | 71°F | 47°F | 38% | 26% | 13 h |
| April 14 | 71°F | 48°F | 38% | 26% | 13 h |
| April 15 | 71°F | 48°F | 38% | 26% | 13 h |
| April 16 | 72°F | 48°F | 38% | 26% | 13 h 10 min |
| April 17 | 72°F | 48°F | 38% | 26% | 13 h 10 min |
| April 18 | 72°F | 49°F | 38% | 26% | 13 h 10 min |
| April 19 | 72°F | 49°F | 38% | 26% | 13 h 10 min |
| April 20 | 73°F | 49°F | 38% | 26% | 13 h 10 min |
| April 21 | 73°F | 50°F | 38% | 26% | 13 h 20 min |
| April 22 | 73°F | 50°F | 38% | 26% | 13 h 20 min |
| April 23 | 74°F | 50°F | 38% | 26% | 13 h 20 min |
| April 24 | 74°F | 51°F | 38% | 26% | 13 h 20 min |
| April 25 | 74°F | 51°F | 37% | 25% | 13 h 20 min |
| April 26 | 74°F | 51°F | 37% | 25% | 13 h 30 min |
| April 27 | 75°F | 51°F | 37% | 25% | 13 h 30 min |
| April 28 | 75°F | 52°F | 37% | 25% | 13 h 30 min |
| April 29 | 75°F | 52°F | 37% | 25% | 13 h 30 min |
| April 30 | 75°F | 52°F | 37% | 25% | 13 h 30 min |
- Normal high
- 71°FApril average
- Normal low
- 48°FApril average
- Precipitation
- 4.71 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 12 h 30 min to 13 h 30 minApril 1 to April 30
- Days at 70°F or more
- 18
- Days at 80°F or more
- 6
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013891; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Knoxville in April?
On a given April day the chance of 0.01 inch or more is 38% on average, highest around April 1 (39%). In all, 4.71 in falls on 11 days of a normal April, 1 of them with an inch or more.
In a normal April in Knoxville, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013891.
How humid and windy is Knoxville in April?
At 3 p.m. the normal temperature is 72°F with 48% relative humidity and a dew point of 51°F; at 6 a.m. it is 54°F with 85% humidity. The wind averages 6.6 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 54°F | 50°F | 85% | 4.4 mph | 34% |
| 9 a.m. | 62°F | 52°F | 70% | 6.7 mph | – |
| noon | 69°F | 51°F | 54% | 8.9 mph | 37% |
| 3 p.m. | 72°F | 51°F | 48% | 9.6 mph | – |
| 6 p.m. | 70°F | 50°F | 50% | 8.3 mph | 41% |
| 9 p.m. | 63°F | 51°F | 64% | 5.6 mph | 49% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013891. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for April in Knoxville?
The warmest April temperature on Knoxville's official record (since 1871) is 93°F, on April 24, 1925; the coldest is 22°F, on April 1, 1987. The wettest April brought 17.62 in (1874); the snowiest, 10.7 inches (1987).
The April mean against the 1991-2020 normal of 59.6°F: 2021 57.8°F (−1.8), 2022 58.3°F (−1.3), 2023 59.2°F (−0.4), 2024 61.4°F (+1.8), 2025 63.7°F (+4.1), 2026 65.3°F (+5.7). 3 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.8°F | −1.8°F | 1.23 in |
| 2022 | 58.3°F | −1.3°F | 3.68 in |
| 2023 | 59.2°F | −0.4°F | 3.42 in |
| 2024 | 61.4°F | +1.8°F | 3.90 in |
| 2025 | 63.7°F | +4.1°F | 5.41 in |
| 2026 | 65.3°F | +5.7°F | 3.00 in |
Source: records: ACIS, NWS threaded record TYSthr; recent months: ACIS, station USW00013891. Records and recent months use complete months only.
How does April in Knoxville compare across Tennessee?
Across the 116 places PlainClimate covers in Tennessee, April normal highs run from 65°F in Roan Mountain to 75°F in Ardmore; Knoxville's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.