Monticello, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monticello, a village in Lewis County, Missouri.
Today
55°F
Slight Chance Drizzle
A slight chance of drizzle before 1pm. Cloudy, with a high near 55. West wind 10 to 14 mph, with gusts as high as 23 mph.
7-day forecast for Monticello
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Slight Chance Drizzle | 10 to 14 mph W | 12% |
| Tonight | 43°F | Mostly Cloudy | 8 mph W | 2% |
| Thursday | 57°F | Mostly Cloudy | 7 to 10 mph W | 4% |
| Thursday Night | 44°F | Slight Chance Light Rain then Mostly Cloudy | 7 mph NW | 23% |
| Friday | 52°F | Mostly Sunny | 8 mph N | 2% |
| Friday Night | 33°F | Partly Cloudy | 1 to 5 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 60°F | Sunny | 6 mph W | 1% |
| Sunday Night | 36°F | Clear | 2 mph W | 0% |
| Monday | 66°F | Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 41°F | Clear | 5 mph W | 0% |
| Tuesday | 67°F | Sunny | 3 mph NW | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 2 mph NE | 1% |
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 Nov 4, 2026.