Alpena, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpena, a city in Alpena County, Michigan.
This Afternoon
70°F
Mostly Cloudy
Mostly cloudy. High near 70, with temperatures falling to around 65 in the afternoon. South wind 10 to 15 mph.
7-day forecast for Alpena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Cloudy | 10 to 15 mph S | 9% |
| Tonight | 56°F | Mostly Cloudy | 5 to 10 mph S | 11% |
| Wednesday | 64°F | Rain Showers Likely | 5 to 15 mph SE | 59% |
| Wednesday Night | 49°F | Rain Showers Likely then Mostly Cloudy | 5 to 10 mph S | 55% |
| Thursday | 56°F | Rain Showers | 5 to 10 mph SW | 80% |
| Thursday Night | 38°F | Rain Showers | 5 to 15 mph NW | 92% |
| Friday | 47°F | Rain Showers | 15 mph N | 85% |
| Friday Night | 35°F | Chance Rain Showers | 5 to 15 mph N | 54% |
| Saturday | 48°F | Partly Sunny | 5 to 10 mph NW | 12% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph W | 8% |
| Sunday | 52°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph W | 17% |
| Sunday Night | 35°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 17% |
| Monday | 53°F | Partly Sunny | 5 to 10 mph W | 10% |
| Monday Night | 38°F | Mostly Cloudy | 5 to 10 mph W | 10% |
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 Nov 3, 2026.