Napoleon, MI Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. South southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 6 mph SSW | 0% |
| Tonight | 58°F | Mostly Clear | 1 to 6 mph S | 0% |
| Wednesday | 87°F | Sunny | 1 to 7 mph SW | 3% |
| Wednesday Night | 63°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph WSW | 64% |
| Thursday | 83°F | Showers And Thunderstorms | 2 to 7 mph WSW | 76% |
| Thursday Night | 61°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph WSW | 76% |
| Friday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 40% |
| Friday Night | 61°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 40% |
| Saturday | 87°F | Mostly Sunny | 2 to 9 mph WSW | 11% |
| Saturday Night | 64°F | Chance Rain Showers | 3 to 8 mph SW | 26% |
| Sunday | 88°F | Chance Rain Showers | 3 to 14 mph SW | 26% |
| Sunday Night | 66°F | Chance Rain Showers | 7 to 13 mph WSW | 42% |
| Monday | 87°F | Chance Rain Showers | 7 to 10 mph WSW | 42% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 52% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Napoleon, MI
Last spring frost
Apr 30
First fall frost
Oct 14
Growing season
165 days
Hardiness zone
6a
Explore more for Napoleon, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Manchester, Mi (11.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.