Rantoul, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rantoul, a village in Champaign County, Illinois.
Today
86°F
Showers And Thunderstorms then Chance Showers And Thunderstorms
Showers and thunderstorms before noon, then a chance of showers and thunderstorms between noon and 3pm. Mostly cloudy, with a high near 86. East southeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Rantoul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph ESE | 79% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 6 mph SSW | 32% |
| Sunday | 78°F | Chance Showers And Thunderstorms | 3 to 12 mph N | 70% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 13 mph NE | 65% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph ENE | 67% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 46% |
| Tuesday | 65°F | Chance Rain Showers | 14 mph NE | 38% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 8 to 12 mph NNE | 38% |
| Wednesday | 67°F | Partly Sunny | 10 mph NNE | 6% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 9 mph NNE | 5% |
| Thursday | 69°F | Partly Sunny | 6 to 9 mph NNE | 3% |
| Thursday Night | 53°F | Partly Cloudy | 5 to 8 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 6 to 9 mph NNE | 3% |
| Friday Night | 52°F | Partly Cloudy | 5 to 8 mph NE | 3% |
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 Sep 19, 2026.