Harrison, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Harrison, a community in Jackson County, Illinois.

Overnight

64°F

Patchy Fog

Patchy fog. Mostly clear. Low around 64, with temperatures rising to around 69 overnight. North northeast wind around 1 mph.

7-day forecast for Harrison

When	Temp	Forecast	Wind	Precip
Overnight	64°F	Patchy Fog	1 mph NNE	0%
Tuesday	87°F	Patchy Fog then Sunny	2 mph ENE	0%
Tuesday Night	65°F	Mostly Clear	2 mph E	0%
Wednesday	90°F	Sunny	2 mph S	0%
Wednesday Night	69°F	Partly Cloudy	2 mph S	6%
Thursday	89°F	Chance Showers And Thunderstorms	2 to 6 mph SSW	31%
Thursday Night	70°F	Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	1 to 5 mph SSE	59%
Friday	89°F	Showers And Thunderstorms Likely then Chance Showers And Thunderstorms	5 mph SW	59%
Friday Night	70°F	Chance Showers And Thunderstorms	2 mph SSW	40%
Saturday	89°F	Chance Showers And Thunderstorms	5 mph SSW	40%
Saturday Night	71°F	Slight Chance Showers And Thunderstorms then Partly Cloudy	3 mph SSW	15%
Sunday	92°F	Sunny	3 to 8 mph SSW	7%
Sunday Night	73°F	Mostly Clear	7 mph SSW	4%
Monday	93°F	Sunny	5 to 9 mph SSW	5%

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

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

All Illinois locations ›

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 Aug 4, 2026.