Amasa, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Amasa, a community in Iron County, Michigan.
This Afternoon
63°F
Chance Rain Showers
A chance of rain showers after 4pm. Mostly cloudy. High near 63, with temperatures falling to around 59 in the afternoon. Southeast wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Amasa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Chance Rain Showers | 5 mph SE | 27% |
| Tonight | 37°F | Chance Rain Showers | 5 mph SE | 28% |
| Saturday | 65°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph E | 35% |
| Saturday Night | 37°F | Mostly Cloudy | 0 mph | 10% |
| Sunday | 64°F | Partly Sunny | 0 to 10 mph NE | 0% |
| Sunday Night | 33°F | Mostly Cloudy | 0 to 5 mph NE | 0% |
| Monday | 61°F | Partly Sunny | 0 to 5 mph E | 0% |
| Monday Night | 31°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Tuesday | 63°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Tuesday Night | 32°F | Mostly Clear | 0 to 5 mph E | 5% |
| Wednesday | 65°F | Mostly Sunny | 0 to 5 mph NE | 5% |
| Wednesday Night | 35°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Thursday | 69°F | Partly Sunny | 0 to 5 mph N | 5% |
| Thursday Night | 37°F | Partly Cloudy | 0 mph | 5% |
Forecast source: National Weather Service (api.weather.gov) for Amasa (46.229, -88.458). Updated through the day.
Growing snapshot for Amasa
Last spring frost
Jun 6
First fall frost
Sep 9
Growing season
94 days
Hardiness zone
4a
More local growing data for Amasa: nearby ZIP 49903 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Amasa 1W, Mi (7.2 mi from Amasa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.