Usually the average weather in Knoxville throughout the time of April is 14 with a general average high of 22 and low being 10 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 14 |
| High Temperature | 22 |
| Low Temperature | 10 |
Useful Links: Knoxville Weather: Average Weather & Yearly Climate