Napoleon, MO Weather & Growing Conditions
Today
57°F
Mostly Cloudy
Mostly cloudy, with a high near 57. West wind 6 to 10 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 57°F | Mostly Cloudy | 6 to 10 mph W | 1% |
| Tonight | 39°F | Mostly Clear | 5 mph WSW | 1% |
| Thursday | 57°F | Mostly Sunny | 3 to 7 mph WNW | 0% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NNW | 16% |
| Friday | 55°F | Partly Sunny | 6 mph N | 1% |
| Friday Night | 33°F | Mostly Cloudy | 2 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 1 mph NW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 61°F | Sunny | 2 mph WNW | 0% |
| Sunday Night | 36°F | Clear | 1 mph WSW | 0% |
| Monday | 66°F | Sunny | 1 to 6 mph SSW | 0% |
| Monday Night | 40°F | Clear | 2 mph SW | 0% |
| Tuesday | 68°F | Sunny | 3 mph WNW | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 1 mph E | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Napoleon, MO
Last spring frost
Apr 19
First fall frost
Oct 18
Growing season
180 days
Hardiness zone
6a
Explore more for Napoleon, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Richmond 3S, Mo (12.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.