Rantoul, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rantoul, a village in Champaign County, Illinois.
Overnight
59°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 59. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Rantoul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Chance Light Rain | 14 mph S | 50% |
| Wednesday | 63°F | Chance Light Rain then Slight Chance Drizzle | 12 to 15 mph SW | 30% |
| Wednesday Night | 45°F | Slight Chance Drizzle then Mostly Cloudy | 12 mph SW | 10% |
| Thursday | 60°F | Mostly Cloudy then Slight Chance Light Rain | 10 to 15 mph WSW | 17% |
| Thursday Night | 43°F | Chance Light Rain | 7 mph NW | 29% |
| Friday | 53°F | Partly Sunny | 10 mph NNW | 12% |
| Friday Night | 33°F | Partly Cloudy | 3 to 8 mph NNW | 0% |
| Saturday | 52°F | Sunny | 6 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 3 mph WNW | 1% |
| Sunday | 58°F | Sunny | 3 to 8 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 5 mph W | 0% |
| Monday | 62°F | Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 38°F | Clear | 6 mph WSW | 1% |
| Tuesday | 65°F | Sunny | 5 mph WNW | 1% |
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
6a
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
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 Nov 4, 2026.