Dover, IL Weather & Growing Conditions

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

Tonight

65°F

Mostly Cloudy then Chance Showers And Thunderstorms

A chance of showers and thunderstorms after 1am. Mostly cloudy. Low around 65, with temperatures rising to around 67 overnight. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Dover

When	Temp	Forecast	Wind	Precip
Tonight	65°F	Mostly Cloudy then Chance Showers And Thunderstorms	10 mph E	33%
Saturday	81°F	Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	5 to 10 mph SE	64%
Saturday Night	65°F	Chance Showers And Thunderstorms then Showers And Thunderstorms	5 mph N	81%
Sunday	72°F	Showers And Thunderstorms	10 to 15 mph NE	81%
Sunday Night	57°F	Showers And Thunderstorms	15 mph NE	76%
Monday	65°F	Showers And Thunderstorms Likely	15 mph NE	60%
Monday Night	52°F	Chance Rain Showers	10 to 20 mph NE	42%
Tuesday	64°F	Chance Rain Showers	15 mph NE	37%
Tuesday Night	50°F	Mostly Cloudy	5 to 15 mph NE	6%
Wednesday	67°F	Partly Sunny	10 mph NE	5%
Wednesday Night	52°F	Partly Cloudy	5 to 10 mph NE	5%
Thursday	70°F	Mostly Sunny	5 mph N	4%
Thursday Night	53°F	Partly Cloudy	0 to 5 mph NE	5%
Friday	71°F	Mostly Sunny	5 mph NE	5%

Forecast source: National Weather Service (api.weather.gov) for Dover (41.434, -89.396). Updated through the day.

Growing snapshot for Dover

Last spring frost

Apr 22

First fall frost

Oct 17

Growing season

177 days

More local growing data for Dover: nearby ZIP 61323 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Princeton, Il (5.6 mi from Dover). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.