Monticello, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Lewis County, Missouri.
This Afternoon
86°F
Sunny
Sunny, with a high near 86. Heat index values as high as 100. East wind around 6 mph.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 86°F | Sunny | 6 mph E | 10% |
| Tonight | 72°F | Partly Cloudy | 5 mph SE | 10% |
| Saturday | 91°F | Partly Sunny | 7 mph SW | 7% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 3 mph W | 47% |
| Sunday | 80°F | Showers And Thunderstorms Likely | 2 to 7 mph N | 65% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 8 mph NE | 71% |
| Monday | 68°F | Showers And Thunderstorms Likely | 9 mph NE | 71% |
| Monday Night | 56°F | Chance Rain Showers | 8 mph NE | 45% |
| Tuesday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph NE | 22% |
| Tuesday Night | 51°F | Mostly Cloudy | 6 mph N | 5% |
| Wednesday | 69°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 3 mph NE | 1% |
| Thursday | 71°F | Partly Sunny | 3 mph NE | 5% |
| Thursday Night | 57°F | Partly Cloudy | 2 mph NE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Monticello (40.119, -91.713). Updated through the day.
Growing snapshot for Monticello
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
194 days
Hardiness zone
6a
More local growing data for Monticello: nearby ZIP 63457 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Canton L&D 20, Mo (10.5 mi from Monticello). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.