Hanover, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Hanover, a community in Rock County, Wisconsin.

This Afternoon

67°F

Rain Showers

Rain showers. Cloudy, with a high near 67. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Hanover

When	Temp	Forecast	Wind	Precip
This Afternoon	67°F	Rain Showers	15 mph S	95%
Tonight	56°F	Rain Showers	15 mph S	92%
Wednesday	60°F	Rain Showers Likely	15 mph SW	65%
Wednesday Night	46°F	Chance Rain Showers then Chance Light Rain	15 mph SW	35%
Thursday	54°F	Light Rain Likely	10 to 15 mph W	68%
Thursday Night	39°F	Chance Light Rain	10 to 15 mph NW	34%
Friday	49°F	Slight Chance Light Rain then Partly Sunny	10 to 15 mph N	16%
Friday Night	31°F	Partly Cloudy	0 to 10 mph N	1%
Saturday	51°F	Mostly Sunny	0 to 5 mph W	4%
Saturday Night	32°F	Partly Cloudy	0 to 5 mph W	4%
Sunday	57°F	Mostly Sunny then Slight Chance Light Rain	5 to 10 mph W	16%
Sunday Night	34°F	Mostly Clear	5 to 10 mph W	5%
Monday	59°F	Sunny	5 to 15 mph SW	1%
Monday Night	38°F	Mostly Clear	5 to 10 mph W	1%

Forecast source: National Weather Service (api.weather.gov) for Hanover (42.639, -89.171). Updated through the day.

Growing snapshot for Hanover

Last spring frost

Apr 26

First fall frost

Oct 15

Growing season

170 days

Hardiness zone

More local growing data for Hanover: nearby ZIP 53537 weather · frost dates · planting calendar · Wisconsin frost dates

Nearby towns & communities

Brodhead Clinton Edgerton Evansville Footville Fulton Janesville Lake Koshkonong Milton Orfordville Shopiere

All Wisconsin locations ›

Climate data from the nearest NOAA station, Afton - Janesville Wwtp, Wi (7.8 mi from Hanover). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.