Harrisburg, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a city in Poinsett County, Arkansas.
Tonight
56°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 11pm. Mostly cloudy, with a low around 56. Southwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph SW | 16% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 48°F | Mostly Clear | 0 mph | 0% |
| Thursday | 72°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph WNW | 2% |
| Friday | 67°F | Mostly Sunny | 5 mph N | 0% |
| Friday Night | 46°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 62°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 42°F | Partly Cloudy | 0 mph | 2% |
| Sunday | 65°F | Sunny | 0 to 5 mph NW | 6% |
| Sunday Night | 40°F | Mostly Clear | 0 to 5 mph WNW | 2% |
| Monday | 68°F | Sunny | 0 to 5 mph WSW | 0% |
| Monday Night | 43°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Tuesday | 72°F | Sunny | 0 to 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Harrisburg (35.564, -90.722). Updated through the day.
Growing snapshot for Harrisburg
Last spring frost
Mar 28
First fall frost
Nov 7
Growing season
224 days
Hardiness zone
8a
More local growing data for Harrisburg: nearby ZIP 72432 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Poinsett Sp, Ar (2.6 mi from Harrisburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.