Monticello, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Green County, Wisconsin.
Today
58°F
Cloudy then Isolated Rain Showers
Isolated rain showers after 3pm. Cloudy. High near 58, with temperatures falling to around 52 in the afternoon. Southwest wind around 15 mph.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Cloudy then Isolated Rain Showers | 15 mph SW | 13% |
| Tonight | 45°F | Chance Rain Showers | 15 mph SW | 27% |
| Thursday | 54°F | Rain Showers Likely then Chance Light Rain | 10 to 15 mph W | 57% |
| Thursday Night | 38°F | Mostly Cloudy | 10 mph N | 12% |
| Friday | 48°F | Partly Sunny | 5 to 10 mph N | 3% |
| Friday Night | 29°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 0% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 0 to 5 mph NW | 0% |
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 Nov 4, 2026.