Monticello, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Green County, Wisconsin.
Overnight
56°F
Slight Chance Light Rain
A slight chance of rain. Cloudy, with a low around 56. South wind around 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Light Rain | 15 mph S | 23% |
| Wednesday | 59°F | Slight Chance Light Rain | 15 mph SW | 22% |
| Wednesday Night | 45°F | Cloudy then Chance Light Rain | 15 mph SW | 27% |
| Thursday | 54°F | Light Rain Likely | 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% |
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.