Fort Smith, AR Weather & Growing Conditions
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 100. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 5 to 10 mph SW | 0% |
| Tonight | 74°F | Mostly Clear | 0 to 10 mph S | 0% |
| Sunday | 97°F | Mostly Sunny | 0 to 5 mph S | 3% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 45% |
| Monday | 92°F | Chance Showers And Thunderstorms | 0 to 10 mph NW | 45% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph N | 21% |
| Tuesday | 87°F | Mostly Sunny | 5 to 10 mph N | 9% |
| Tuesday Night | 64°F | Partly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 88°F | Mostly Sunny | 5 mph NE | 3% |
| Wednesday Night | 63°F | Mostly Clear | 5 mph E | 2% |
| Thursday | 88°F | Mostly Sunny | 5 mph E | 2% |
| Thursday Night | 65°F | Partly Cloudy | 5 mph E | 1% |
| Friday | 89°F | Mostly Sunny | 5 mph E | 5% |
| Friday Night | 65°F | Partly Cloudy | 5 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fort Smith, AR
Last spring frost
Mar 25
First fall frost
Nov 6
Growing season
224 days
Hardiness zone
8a
Explore more for Fort Smith, AR: full frost dates · planting calendar · Arkansas frost dates
Climate data from the nearest NOAA station, Ft Smith Rgnl Ap, Ar (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.