Thornton, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thornton, a city in Calhoun County, Arkansas.
This Afternoon
73°F
Showers And Thunderstorms
Showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Cloudy. High near 73, with temperatures falling to around 68 in the afternoon. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Thornton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Showers And Thunderstorms | 5 to 10 mph SW | 100% |
| Tonight | 48°F | Partly Cloudy | 0 to 5 mph W | 14% |
| Wednesday | 71°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 43°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 74°F | Mostly Sunny | 0 mph | 0% |
| Thursday Night | 47°F | Partly Cloudy | 0 mph | 0% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Friday Night | 40°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Saturday | 65°F | Mostly Sunny | 0 to 5 mph NNE | 0% |
| Saturday Night | 37°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 66°F | Mostly Sunny | 0 to 5 mph NNW | 5% |
| Sunday Night | 36°F | Mostly Clear | 0 mph | 1% |
| Monday | 69°F | Sunny | 0 to 5 mph WNW | 0% |
| Monday Night | 37°F | Clear | 0 mph | 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 Nov 3, 2026.