Monroe, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Green County, Wisconsin.
This Afternoon
67°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 67. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Light Rain | 15 to 20 mph S | 78% |
| Tonight | 55°F | Light Rain | 10 to 15 mph S | 84% |
| Wednesday | 58°F | Light Rain Likely | 15 mph SW | 62% |
| Wednesday Night | 47°F | Chance Light Rain | 15 mph SW | 34% |
| Thursday | 53°F | Light Rain Likely | 10 to 15 mph W | 68% |
| Thursday Night | 41°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 28% |
| Friday | 48°F | Partly Sunny | 10 to 15 mph N | 13% |
| Friday Night | 33°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 5 mph W | 2% |
| Saturday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 5% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Light Rain | 10 mph W | 15% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph W | 4% |
| Monday | 59°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 10 mph W | 0% |
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 Nov 4, 2026.