Knoxville, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knoxville, a town in Johnson County, Arkansas.
This Afternoon
73°F
Partly Sunny
Partly sunny. High near 73, with temperatures falling to around 69 in the afternoon. West wind around 10 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Knoxville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Partly Sunny | 10 mph W | 4% |
| Tonight | 48°F | Mostly Cloudy | 10 mph W | 5% |
| Wednesday | 68°F | Sunny | 5 to 15 mph W | 0% |
| Wednesday Night | 40°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 72°F | Sunny | 0 to 5 mph SSE | 1% |
| Thursday Night | 45°F | Mostly Cloudy | 0 to 5 mph NNW | 5% |
| Friday | 68°F | Sunny | 5 mph NNW | 0% |
| Friday Night | 38°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 65°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 0 mph | 4% |
| Sunday | 67°F | Sunny | 0 to 5 mph WNW | 4% |
| Sunday Night | 36°F | Clear | 0 to 5 mph NW | 1% |
| Monday | 69°F | Sunny | 0 to 5 mph WNW | 0% |
| Monday Night | 38°F | Mostly Clear | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov) for Knoxville (35.378, -93.362). Updated through the day.
Growing snapshot for Knoxville
Last spring frost
Mar 24
First fall frost
Nov 10
Growing season
233 days
Hardiness zone
8a
More local growing data for Knoxville: nearby ZIP 72845 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Clarksville 2N, Ar (10.9 mi from Knoxville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.