Alpena, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpena, a city in Alpena County, Michigan.
Today
87°F
Sunny
Sunny. High near 87, with temperatures falling to around 85 in the afternoon. South wind 5 to 10 mph.
7-day forecast for Alpena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 5 to 10 mph S | 0% |
| Tonight | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 10 mph SW | 39% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph NW | 59% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph N | 58% |
| Thursday | 77°F | Rain Showers Likely then Partly Sunny | 0 to 5 mph NE | 58% |
| Thursday Night | 60°F | Partly Cloudy | 0 to 5 mph S | 8% |
| Friday | 83°F | Sunny | 0 to 10 mph S | 5% |
| Friday Night | 64°F | Mostly Clear | 5 to 10 mph S | 5% |
| Saturday | 86°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 24% |
| Saturday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SW | 38% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 48% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 48% |
| Monday | 80°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 32% |
| Monday Night | 60°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 33% |
Forecast source: National Weather Service (api.weather.gov) for Alpena (45.074, -83.444). Updated through the day.
Growing snapshot for Alpena
Last spring frost
May 5
First fall frost
Oct 17
Growing season
163 days
Hardiness zone
5b
More local growing data for Alpena: nearby ZIP 49707 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Alpena Wwtp, Mi (3.3 mi from Alpena). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.