Monticello, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Green County, Wisconsin.
Today
72°F
Showers And Thunderstorms
Showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 11am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 72. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Tonight | 59°F | Showers And Thunderstorms | 5 to 10 mph E | 82% |
| Sunday | 65°F | Rain Showers Likely | 10 to 15 mph NE | 67% |
| Sunday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Monday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Monday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 19% |
| Tuesday | 62°F | Partly Sunny | 10 to 15 mph NE | 11% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 70°F | Mostly Sunny | 5 mph NE | 4% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov) for Monticello (42.745, -89.590). Updated through the day.
Growing snapshot for Monticello
Last spring frost
Apr 27
First fall frost
Oct 14
Growing season
170 days
Hardiness zone
5a
More local growing data for Monticello: nearby ZIP 53570 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Monroe Wwtp, Wi (9.4 mi from Monticello). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.