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Donovan, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Donovan, a village in Iroquois County, Illinois.

Tonight
63°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 63. East southeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Donovan

WhenTempForecastWindPrecip
Tonight 63°F Mostly Cloudy then Slight Chance Showers And Thunderstorms 5 to 10 mph ESE 19%
Saturday 82°F Showers And Thunderstorms Likely 5 to 10 mph SE 60%
Saturday Night 68°F Chance Showers And Thunderstorms 5 mph SW 67%
Sunday 75°F Showers And Thunderstorms Likely 5 to 10 mph N 68%
Sunday Night 55°F Showers And Thunderstorms Likely 10 mph NE 66%
Monday 66°F Showers And Thunderstorms Likely 10 mph ENE 64%
Monday Night 50°F Chance Showers And Thunderstorms 10 mph NE 42%
Tuesday 66°F Slight Chance Rain Showers 10 mph NE 22%
Tuesday Night 50°F Slight Chance Rain Showers then Mostly Cloudy 5 to 10 mph NNE 18%
Wednesday 68°F Partly Sunny 5 mph NNE 7%
Wednesday Night 51°F Mostly Cloudy 0 to 5 mph NNE 7%
Thursday 70°F Partly Sunny 0 to 5 mph NNE 4%
Thursday Night 52°F Partly Cloudy 0 to 5 mph NNE 4%
Friday 72°F Mostly Sunny 0 to 5 mph NNE 3%

Forecast source: National Weather Service (api.weather.gov) for Donovan (40.885, -87.614). Updated through the day.

Growing snapshot for Donovan

Last spring frost
Apr 24
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
5b

More local growing data for Donovan: nearby ZIP 60931 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Watseka 2 Nw, Il (10.9 mi from Donovan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.