Napoleon, MI Weather & Growing Conditions
This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 73 in the afternoon. South wind around 13 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 13 mph S | 3% |
| Tonight | 61°F | Partly Cloudy then Slight Chance Rain Showers | 13 mph SSE | 17% |
| Wednesday | 69°F | Rain Showers | 12 to 16 mph S | 83% |
| Wednesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SW | 37% |
| Thursday | 61°F | Mostly Cloudy | 9 to 15 mph SW | 13% |
| Thursday Night | 43°F | Mostly Cloudy then Chance Rain Showers | 2 to 8 mph W | 29% |
| Friday | 55°F | Chance Rain Showers | 2 to 9 mph NW | 44% |
| Friday Night | 33°F | Chance Rain Showers | 8 mph NNW | 36% |
| Saturday | 52°F | Partly Sunny | 8 mph NW | 14% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 6% |
| Sunday | 56°F | Mostly Sunny then Slight Chance Rain Showers | 2 to 10 mph W | 16% |
| Sunday Night | 31°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 9 mph WNW | 16% |
| Monday | 59°F | Mostly Sunny | 6 to 12 mph W | 13% |
| Monday Night | 36°F | Partly Cloudy | 9 mph WSW | 10% |
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 Nov 4, 2026.