Rantoul, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Rantoul, a village in Champaign County, Illinois.

Today

83°F

Mostly Sunny

Mostly sunny, with a high near 83. South wind around 5 mph.

7-day forecast for Rantoul

When	Temp	Forecast	Wind	Precip
Today	83°F	Mostly Sunny	5 mph S	0%
Tonight	65°F	Mostly Clear	5 mph SSE	0%
Wednesday	84°F	Mostly Sunny	3 to 7 mph SSW	12%
Wednesday Night	66°F	Chance Showers And Thunderstorms	5 mph SSW	81%
Thursday	81°F	Showers And Thunderstorms	5 mph SSW	81%
Thursday Night	64°F	Chance Showers And Thunderstorms	3 mph S	40%
Friday	82°F	Mostly Sunny then Slight Chance Showers And Thunderstorms	2 mph S	18%
Friday Night	65°F	Slight Chance Showers And Thunderstorms	2 mph SSW	24%
Saturday	84°F	Slight Chance Rain Showers then Mostly Sunny	5 mph SSW	18%
Saturday Night	69°F	Mostly Clear	2 to 8 mph SSW	13%
Sunday	86°F	Sunny	8 to 12 mph SSW	9%
Sunday Night	71°F	Partly Cloudy	10 mph SSW	13%
Monday	87°F	Slight Chance Showers And Thunderstorms	10 mph SW	19%
Monday Night	70°F	Slight Chance Showers And Thunderstorms	10 mph SW	30%

Forecast source: National Weather Service (api.weather.gov) for Rantoul (40.303, -88.155). Updated through the day.

Growing snapshot for Rantoul

Last spring frost

Apr 21

First fall frost

Oct 18

Growing season

179 days

Hardiness zone

More local growing data for Rantoul: nearby ZIP 61866 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Bondville Broadlands Champaign Dewey Fisher Foosland Gifford Homer Ivesdale Lake of the Woods Longview Ludlow Mahomet Ogden Penfield Pesotum Philo Royal Sadorus Savoy Seymour Sidney St. Joseph Thomasboro Tolono Urbana

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Climate data from the nearest NOAA station, Rantoul, Il (0.1 mi from Rantoul). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.