Knoxville, AR Weather & Growing Conditions
Today
97°F
Sunny
Sunny, with a high near 97. Heat index values as high as 97. West southwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 97°F | Sunny | 0 to 5 mph WSW | 0% |
| Tonight | 74°F | Mostly Clear | 0 to 5 mph S | 0% |
| Sunday | 96°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Sunday Night | 75°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph WNW | 29% |
| Monday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 29% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph NNW | 26% |
| Tuesday | 85°F | Mostly Sunny | 5 mph NNE | 14% |
| Tuesday Night | 65°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 84°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 64°F | Mostly Clear | 5 mph ENE | 0% |
| Thursday | 84°F | Mostly Sunny | 5 mph ENE | 1% |
| Thursday Night | 65°F | Partly Cloudy | 5 mph ENE | 1% |
| Friday | 84°F | Mostly Sunny | 5 mph E | 6% |
| Friday Night | 65°F | Partly Cloudy | 5 mph ENE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Knoxville, AR
Last spring frost
Mar 24
First fall frost
Nov 10
Growing season
233 days
Hardiness zone
8a
Explore more for Knoxville, AR: full frost dates · planting calendar · Arkansas frost dates
Climate data from the nearest NOAA station, Clarksville 2N, Ar (10.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.