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
Patchy Fog
Patchy fog. Clear, with a low around 59. Southeast wind around 3 mph.
7-day forecast for Dewey
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Patchy Fog | 3 mph SE | 0% |
| Tuesday | 83°F | Patchy Fog then Sunny | 5 mph S | 0% |
| Tuesday Night | 65°F | Mostly Clear | 5 mph SSE | 0% |
| Wednesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph SSW | 15% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms | 5 mph S | 81% |
| Thursday | 81°F | Showers And Thunderstorms | 6 mph SSW | 81% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms | 5 mph S | 34% |
| Friday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 mph S | 15% |
| Friday Night | 65°F | Chance Showers And Thunderstorms | 2 mph S | 25% |
| Saturday | 84°F | Slight Chance Rain Showers then Mostly Sunny | 6 mph SSW | 17% |
| Saturday Night | 68°F | Mostly Clear | 3 to 8 mph SSW | 13% |
| Sunday | 86°F | Sunny | 8 to 13 mph SSW | 9% |
| Sunday Night | 70°F | Partly Cloudy | 12 mph SSW | 13% |
| Monday | 87°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 18% |
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 Aug 4, 2026.