Monroe, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Green County, Wisconsin.
Today
82°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 82. Southwest wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 24% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph W | 89% |
| Wednesday | 74°F | Patchy Fog | 5 mph NW | 72% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 5 mph NW | 39% |
| Thursday | 77°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 21% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph SE | 4% |
| Friday | 79°F | Mostly Sunny | 0 to 5 mph S | 5% |
| Friday Night | 63°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 82°F | Mostly Sunny | 5 to 10 mph SW | 13% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 10 mph SW | 26% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 26% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 44% |
| Monday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 44% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 10 mph W | 40% |
Forecast source: National Weather Service (api.weather.gov) for Monroe (42.603, -89.638). Updated through the day.
Growing snapshot for Monroe
Last spring frost
Apr 27
First fall frost
Oct 14
Growing season
170 days
Hardiness zone
5a
More local growing data for Monroe: nearby ZIP 53566 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Monroe Wwtp, Wi (1.1 mi from Monroe). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.