Hanover, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hanover, a community in Rock County, Wisconsin.
Today
72°F
Showers And Thunderstorms
Showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 11am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 72. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast for Hanover
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 15 mph E | 84% |
| Sunday | 65°F | Rain Showers | 15 mph NE | 79% |
| Sunday Night | 52°F | Cloudy then Slight Chance Rain Showers | 15 mph NE | 15% |
| Monday | 62°F | Slight Chance Rain Showers | 15 mph NE | 24% |
| Monday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 19% |
| Tuesday | 61°F | Partly Sunny | 10 to 15 mph NE | 11% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 64°F | Mostly Sunny | 10 to 15 mph NE | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 69°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph E | 3% |
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
5b
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
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 Sep 19, 2026.