Napoleon, MO Weather & Growing Conditions
Today
94°F
Mostly Sunny
Mostly sunny, with a high near 94. Heat index values as high as 98. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Mostly Sunny | 5 mph S | 3% |
| Tonight | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 3 mph SSE | 21% |
| Wednesday | 88°F | Chance Showers And Thunderstorms | 2 to 6 mph ESE | 45% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 5 mph NNE | 84% |
| Thursday | 86°F | Showers And Thunderstorms then Partly Sunny | 3 mph NE | 84% |
| Thursday Night | 67°F | Partly Cloudy | 2 mph ESE | 14% |
| Friday | 90°F | Mostly Sunny | 0 to 5 mph S | 14% |
| Friday Night | 69°F | Mostly Clear | 3 mph S | 13% |
| Saturday | 93°F | Sunny | 2 to 7 mph S | 13% |
| Saturday Night | 73°F | Mostly Clear | 7 mph S | 4% |
| Sunday | 95°F | Sunny | 7 to 10 mph SSW | 2% |
| Sunday Night | 74°F | Mostly Clear | 8 mph S | 3% |
| Monday | 96°F | Sunny | 8 to 12 mph SSW | 3% |
| Monday Night | 75°F | Mostly Clear | 9 mph S | 3% |
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 Aug 4, 2026.