Dewey, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dewey, a community in Champaign County, Illinois.
Overnight
59°F
Light Rain
Rain. Cloudy, with a low around 59. South wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Dewey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Light Rain | 16 mph S | 86% |
| Wednesday | 63°F | Chance Drizzle then Mostly Cloudy | 13 to 16 mph SW | 27% |
| Wednesday Night | 46°F | Mostly Cloudy | 13 mph WSW | 10% |
| Thursday | 60°F | Mostly Cloudy then Slight Chance Light Rain | 12 to 16 mph WSW | 17% |
| Thursday Night | 42°F | Chance Light Rain | 8 mph NW | 30% |
| Friday | 53°F | Partly Sunny | 12 mph NNW | 12% |
| Friday Night | 33°F | Partly Cloudy | 5 to 9 mph NNW | 0% |
| Saturday | 53°F | Sunny | 6 mph NW | 0% |
| Saturday Night | 31°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 | 64°F | Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 6 mph WSW | 1% |
| Tuesday | 66°F | Sunny | 6 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Dewey (40.319, -88.283). Updated through the day.
Growing snapshot for Dewey
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
6a
More local growing data for Dewey: nearby ZIP 61840 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Bondville
Broadlands
Champaign
Fisher
Foosland
Gifford
Homer
Ivesdale
Lake of the Woods
Longview
Ludlow
Mahomet
Ogden
Penfield
Pesotum
Philo
Rantoul
Royal
Sadorus
Savoy
Seymour
Sidney
St. Joseph
Thomasboro
Tolono
Urbana
Climate data from the nearest NOAA station, Rantoul, Il (7.5 mi from Dewey). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.