Thornton, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thornton, a city in Calhoun County, Arkansas.
Today
97°F
Sunny
Sunny, with a high near 97. Heat index values as high as 98. Southwest wind around 5 mph.
7-day forecast for Thornton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 97°F | Sunny | 5 mph SW | 1% |
| Tonight | 70°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Sunday | 97°F | Mostly Sunny | 5 mph WSW | 0% |
| Sunday Night | 71°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Monday | 95°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Monday Night | 69°F | Partly Cloudy | 0 mph | 12% |
| Tuesday | 91°F | Mostly Sunny | 0 to 5 mph NNE | 9% |
| Tuesday Night | 64°F | Partly Cloudy | 5 mph NNE | 6% |
| Wednesday | 88°F | Sunny | 5 mph NNE | 3% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Thursday | 86°F | Sunny | 5 mph NE | 0% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 87°F | Mostly Sunny | 0 to 5 mph NE | 1% |
| Friday Night | 62°F | Partly Cloudy | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Thornton (33.775, -92.488). Updated through the day.
Growing snapshot for Thornton
Last spring frost
Mar 26
First fall frost
Nov 6
Growing season
226 days
Hardiness zone
8a
More local growing data for Thornton: nearby ZIP 71766 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fordyce, Ar (8.3 mi from Thornton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.