Monticello, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Lewis County, Missouri.
Today
89°F
Sunny
Sunny, with a high near 89. South wind around 7 mph.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 7 mph S | 1% |
| Tonight | 70°F | Mostly Cloudy | 5 mph SE | 14% |
| Wednesday | 84°F | Chance Showers And Thunderstorms | 3 mph S | 65% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 3 mph NE | 84% |
| Thursday | 83°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 3 mph E | 84% |
| Thursday Night | 66°F | Partly Cloudy | 2 mph E | 8% |
| Friday | 86°F | Mostly Sunny | 2 mph S | 8% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph S | 27% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph SW | 22% |
| Saturday Night | 72°F | Mostly Clear | 3 to 7 mph S | 5% |
| Sunday | 91°F | Sunny | 7 to 10 mph SW | 5% |
| Sunday Night | 72°F | Partly Cloudy | 5 to 8 mph S | 14% |
| Monday | 92°F | Mostly Sunny | 7 to 10 mph SW | 14% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 7 mph S | 22% |
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 Aug 4, 2026.