Thornton, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thornton, a city in Calhoun County, Arkansas.
Today
94°F
Sunny
Sunny, with a high near 94. Heat index values as high as 97. East wind around 0 mph.
7-day forecast for Thornton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 0 mph | 0% |
| Tonight | 71°F | Mostly Clear | 0 mph | 0% |
| Wednesday | 95°F | Sunny | 0 mph | 5% |
| Wednesday Night | 73°F | Partly Cloudy | 0 mph | 7% |
| Thursday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 22% |
| Thursday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 22% |
| Friday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 37% |
| Friday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 37% |
| Saturday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 29% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 29% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 15% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 15% |
| Monday | 93°F | Mostly Sunny | 0 to 5 mph SSW | 14% |
| Monday Night | 73°F | Partly Cloudy | 0 mph | 14% |
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 Aug 4, 2026.