Weather in Knoxville in April

A good month. April is a solid month to be in Knoxville. Highs average 21.2 °C, lows 9 °C, and rain falls on 12 days — nothing in the month is working against you.

April ranks 2 of 12 in Knoxville. Only October scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 12 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average April reaches 30 °C. Across the twenty years measured, the hottest April day reached 29.6 °C and the coldest night fell to -4.9 °C, and the wettest single day dropped 74 mm — roughly 63% of the month's rain in one day.

April is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest April on record still delivered 191 mm against 59 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 118 mm average is a reasonable planning figure, not a promise.

Wind is light at 3.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, high enough to notice on the warm days without dominating them.

How April sits in the year

The month is on the way up: 5.2 °C warmer than March, and May adds another 4.1 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in April

13.1 hours of daylight, gaining 1.1 hours across the month. That is between Knoxville's extremes of 14.6 and 9.7 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 33.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

April in Knoxville versus nearby

If Knoxville is one option among several, the nearby comparison is worth making. Atlanta is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Nashville is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: April is effectively as good as it gets here — 6 points behind October, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Knoxville

See all twelve months in Knoxville, or where else to go in April.