Posen, MI Weather & Growing Conditions
Today
89°F
Sunny
Sunny. High near 89, with temperatures falling to around 87 in the afternoon. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 5 to 10 mph SW | 0% |
| Tonight | 63°F | Mostly Cloudy then Showers And Thunderstorms Likely | 0 to 10 mph W | 57% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph NW | 58% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 45% |
| Thursday | 79°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph NE | 43% |
| Thursday Night | 57°F | Mostly Clear | 5 mph S | 8% |
| Friday | 86°F | Sunny | 5 to 10 mph S | 6% |
| Friday Night | 62°F | Mostly Clear | 5 to 10 mph S | 6% |
| Saturday | 87°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 24% |
| Saturday Night | 62°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 10 mph W | 37% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 46% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 46% |
| Monday | 82°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 31% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Posen, MI
Last spring frost
May 13
First fall frost
Oct 3
Growing season
141 days
Hardiness zone
5b
Explore more for Posen, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Alpena 10Nw, Mi (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.