Monroe, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Green County, Wisconsin.
This Afternoon
68°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 68. East wind around 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Chance Showers And Thunderstorms | 15 mph E | 31% |
| Tonight | 60°F | Chance Showers And Thunderstorms | 10 to 15 mph E | 94% |
| Saturday | 74°F | Showers And Thunderstorms | 5 to 10 mph SE | 90% |
| Saturday Night | 61°F | Showers And Thunderstorms | 5 to 15 mph NE | 80% |
| Sunday | 65°F | Rain Showers Likely | 15 mph NE | 55% |
| Sunday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 15 mph NE | 39% |
| Monday | 62°F | Chance Rain Showers | 15 mph NE | 40% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Tuesday Night | 48°F | Partly Cloudy | 10 mph NE | 9% |
| Wednesday | 64°F | Mostly Sunny | 10 mph NE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 51°F | Partly Cloudy | 5 mph NE | 6% |
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 Sep 18, 2026.