Harrison, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrison, a community in Jackson County, Illinois.
This Afternoon
64°F
Mostly Cloudy
Mostly cloudy. High near 64, with temperatures falling to around 59 in the afternoon. West southwest wind 5 to 9 mph.
7-day forecast for Harrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Cloudy | 5 to 9 mph WSW | 0% |
| Tonight | 44°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 66°F | Sunny | 3 to 7 mph WSW | 1% |
| Thursday Night | 42°F | Partly Cloudy | 3 mph NW | 1% |
| Friday | 57°F | Mostly Cloudy | 5 to 10 mph NNW | 1% |
| Friday Night | 32°F | Mostly Clear | 2 to 6 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 30°F | Mostly Clear | 1 mph NNW | 0% |
| Sunday | 59°F | Sunny | 0 to 3 mph NW | 0% |
| Sunday Night | 32°F | Mostly Clear | 0 mph | 0% |
| Monday | 64°F | Sunny | 0 to 5 mph S | 0% |
| Monday Night | 35°F | Clear | 2 mph SW | 1% |
| Tuesday | 66°F | Sunny | 1 to 5 mph W | 0% |
| Tuesday Night | 38°F | Mostly Clear | 1 mph NNW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Harrison (37.798, -89.336). Updated through the day.
Growing snapshot for Harrison
Last spring frost
Apr 9
First fall frost
Oct 22
Growing season
195 days
Hardiness zone
7a
More local growing data for Harrison: nearby ZIP 62966 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Ava
Campbell Hill
Carbondale
De Soto
Dowell
Elkville
Gorham
Grand Tower
Makanda
Murphysboro
Rockwood
Vergennes
Climate data from the nearest NOAA station, Carbondale Southern Il Ap, Il (5.7 mi from Harrison). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.