Napoleon, MO Weather & Growing Conditions
Tonight
75°F
Partly Cloudy
Partly cloudy, with a low around 75. Heat index values as high as 99. South southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 75°F | Partly Cloudy | 6 mph SSW | 1% |
| Saturday | 96°F | Mostly Sunny | 6 to 9 mph SSW | 2% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 1 to 6 mph WSW | 61% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 1 to 5 mph NNW | 49% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 2 to 6 mph NNE | 63% |
| Monday | 73°F | Showers And Thunderstorms Likely | 7 mph NNE | 62% |
| Monday Night | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 7 mph NNE | 16% |
| Tuesday | 68°F | Mostly Cloudy | 7 mph NNE | 6% |
| Tuesday Night | 50°F | Mostly Cloudy | 2 to 6 mph NE | 3% |
| Wednesday | 72°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 3 mph ENE | 4% |
| Thursday | 74°F | Slight Chance Rain Showers | 3 mph ENE | 16% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph ENE | 15% |
| Friday | 74°F | Slight Chance Rain Showers | 1 to 5 mph E | 18% |
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 Sep 19, 2026.