Dewey, IL Weather & Growing Conditions
Today
62°F
Patchy Drizzle
Patchy drizzle. Mostly cloudy. High near 62, with temperatures falling to around 57 in the afternoon. West southwest wind 12 to 16 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Patchy Drizzle | 12 to 16 mph WSW | 10% |
| Tonight | 46°F | Patchy Drizzle then Mostly Cloudy | 12 mph SW | 10% |
| Thursday | 58°F | Mostly Cloudy then Chance Light Rain | 9 to 17 mph WSW | 26% |
| Thursday Night | 39°F | Chance Light Rain then Cloudy | 7 to 10 mph WNW | 36% |
| Friday | 51°F | Partly Sunny | 9 to 13 mph NNW | 5% |
| Friday Night | 33°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 53°F | Sunny | 7 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 3 mph WNW | 1% |
| Sunday | 59°F | Sunny | 3 to 9 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 5 mph W | 0% |
| Monday | 64°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 6 mph WSW | 1% |
| Tuesday | 66°F | Sunny | 6 mph WNW | 0% |
| Tuesday Night | 38°F | Mostly Clear | 3 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dewey, IL
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
6a
Explore more for Dewey, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Rantoul, Il (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.