Alpena, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpena, a city in Alpena County, Michigan.
This Afternoon
63°F
Mostly Cloudy
Mostly cloudy. High near 63, with temperatures falling to around 60 in the afternoon. Northeast wind around 5 mph.
7-day forecast for Alpena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Mostly Cloudy | 5 mph NE | 0% |
| Tonight | 49°F | Mostly Cloudy | 0 to 5 mph E | 1% |
| Saturday | 65°F | Partly Sunny then Isolated Rain Showers | 5 to 10 mph SE | 20% |
| Saturday Night | 53°F | Scattered Rain Showers | 0 to 10 mph E | 37% |
| Sunday | 65°F | Isolated Rain Showers then Partly Sunny | 5 to 10 mph N | 24% |
| Sunday Night | 47°F | Mostly Cloudy | 10 to 15 mph NE | 1% |
| Monday | 59°F | Mostly Cloudy | 10 to 15 mph NE | 0% |
| Monday Night | 47°F | Mostly Cloudy | 10 to 15 mph NE | 0% |
| Tuesday | 61°F | Mostly Sunny | 10 to 15 mph E | 4% |
| Tuesday Night | 49°F | Partly Cloudy | 10 to 15 mph E | 11% |
| Wednesday | 62°F | Chance Rain Showers | 10 to 15 mph E | 29% |
| Wednesday Night | 49°F | Chance Rain Showers | 5 to 10 mph E | 26% |
| Thursday | 64°F | Partly Sunny | 5 to 10 mph E | 13% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 7% |
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 Sep 19, 2026.