Dover, IL Weather & Growing Conditions

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

Overnight

65°F

Slight Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms before 4am, then patchy fog and a chance of showers and thunderstorms. Mostly cloudy. Low around 65, with temperatures rising to around 67 overnight. Southeast wind around 10 mph. Chance of precipitation is 40%.

7-day forecast for Dover

When	Temp	Forecast	Wind	Precip
Overnight	65°F	Slight Chance Showers And Thunderstorms	10 mph SE	43%
Saturday	80°F	Patchy Fog	5 to 10 mph SE	80%
Saturday Night	65°F	Chance Showers And Thunderstorms then Showers And Thunderstorms	5 to 10 mph SW	92%
Sunday	71°F	Patchy Fog	10 to 15 mph NE	80%
Sunday Night	57°F	Chance Showers And Thunderstorms	15 mph NE	45%
Monday	65°F	Rain Showers Likely	15 mph NE	60%
Monday Night	52°F	Chance Rain Showers	10 to 15 mph NE	36%
Tuesday	63°F	Slight Chance Rain Showers	15 mph NE	18%
Tuesday Night	50°F	Partly Cloudy	10 to 15 mph NE	12%
Wednesday	67°F	Mostly Sunny	10 mph NE	3%
Wednesday Night	52°F	Partly Cloudy	5 to 10 mph NE	1%
Thursday	68°F	Mostly Sunny	5 mph NE	4%
Thursday Night	52°F	Partly Cloudy	5 mph NE	4%
Friday	72°F	Mostly Sunny	5 mph NE	2%

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.