Hanover, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hanover, a community in Rock County, Wisconsin.
Today
84°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Hanover
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 90% |
| Wednesday | 75°F | Patchy Fog | 5 mph W | 75% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 45% |
| Thursday | 78°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 25% |
| Thursday Night | 57°F | Mostly Clear | 0 mph | 7% |
| Friday | 80°F | Mostly Sunny | 0 to 10 mph S | 3% |
| Friday Night | 61°F | Mostly Clear | 5 mph S | 5% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 12% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 15 mph SW | 27% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 45% |
| Monday | 83°F | Chance Rain Showers | 5 to 10 mph S | 44% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 43% |
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 Aug 4, 2026.