Climate averages 1991–2020
Knoxville weather
in April.
A mild, wet month: the 7th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Knoxville: daytime highs average 20.0°C and nights cool to about 8.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 109 mm of rain on roughly 11 days, which makes April a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 05 min on an average April day.
The nearest other city in this atlas is Asheville (130 km away). In April its highs average 18.6°C, 1.4°C cooler than Knoxville, with 93 mm of rain.
Among the 498 cities listed in the United States, Knoxville ranks joint 244th of 498 for the warmest April highs and joint 404th of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Knoxville is 0.6°C warmer than that mean.
From April to May, average highs rise by 4.2°C to 24.1°C, and monthly rainfall falls from 109 mm to 94 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Knoxville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.3°C-0.6°C | -0.6°C | 111 | 10.7 | 10.010 h |
| February | 10.6°C0.8°C | 0.8°C | 110 | 10.9 | 10.911 h |
| March | 15.0°C4.2°C | 4.2°C | 123 | 12.2 | 11.912 h |
| April, selected | 20.0°C8.8°C | 8.8°C | 109 | 10.9 | 13.113 h |
| May | 24.1°C13.8°C | 13.8°C | 94 | 11.7 | 14.014 h |
| June | 28.3°C18.3°C | 18.3°C | 93 | 13.2 | 14.615 h |
| July | 29.8°C20.5°C | 20.5°C | 119 | 14.8 | 14.314 h |
| August | 29.4°C19.9°C | 19.9°C | 86 | 11.4 | 13.514 h |
| September | 26.7°C16.8°C | 16.8°C | 90 | 8.3 | 12.412 h |
| October | 20.9°C10.5°C | 10.5°C | 74 | 7.7 | 11.311 h |
| November | 14.6°C4.5°C | 4.5°C | 96 | 8.9 | 10.310 h |
| December | 9.9°C1.2°C | 1.2°C | 117 | 10.6 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Asheville in AprilUnited States · 130 kmHigh 18.6°C · Low 6.9°C · 93 mm rain
- East Chattanooga in AprilUnited States · 156 kmHigh 21.0°C · Low 9.8°C · 120 mm rain
- Chattanooga in AprilUnited States · 162 kmHigh 21.2°C · Low 10.0°C · 120 mm rain
- Johns Creek in AprilUnited States · 216 kmHigh 21.5°C · Low 10.7°C · 102 mm rain
- Roswell in AprilUnited States · 219 kmHigh 21.2°C · Low 10.4°C · 102 mm rain
- Murfreesboro in AprilUnited States · 223 kmHigh 20.7°C · Low 10.4°C · 124 mm rain
- Athens, United States in AprilUnited States · 228 kmHigh 22.3°C · Low 11.0°C · 93 mm rain
- Sandy Springs in AprilUnited States · 230 kmHigh 21.3°C · Low 10.5°C · 102 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Knoxville) is explained once on the Knoxville year overview and on the Sources, method and limits page.