Hanover, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hanover, a community in Rock County, Wisconsin.
Overnight
56°F
Light Rain
Rain. Cloudy, with a low around 56. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Hanover
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Light Rain | 10 to 15 mph S | 88% |
| Wednesday | 60°F | Slight Chance Light Rain | 15 mph SW | 23% |
| Wednesday Night | 45°F | Cloudy then Slight Chance Light Rain | 15 mph SW | 15% |
| Thursday | 54°F | Light Rain Likely | 10 to 15 mph W | 56% |
| Thursday Night | 37°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 23% |
| Friday | 47°F | Partly Sunny | 10 to 15 mph N | 4% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 33°F | Mostly Clear | 0 to 10 mph W | 0% |
| Monday | 60°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.