Amasa, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Amasa, a community in Iron County, Michigan.
Overnight
60°F
Partly Cloudy
Partly cloudy, with a low around 60. Southwest wind around 5 mph, with gusts as high as 20 mph.
7-day forecast for Amasa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Partly Cloudy | 5 mph SW | 2% |
| Tuesday | 76°F | Chance Rain Showers | 5 to 10 mph W | 27% |
| Tuesday Night | 50°F | Mostly Cloudy | 0 to 5 mph N | 8% |
| Wednesday | 76°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 81°F | Sunny | 0 to 5 mph SW | 2% |
| Thursday Night | 57°F | Mostly Clear | 5 mph SW | 3% |
| Friday | 85°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 16% |
| Friday Night | 58°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 32% |
| Saturday | 80°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph W | 25% |
| Saturday Night | 55°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Sunday | 78°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Sunday Night | 52°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 33% |
| Monday | 78°F | Slight Chance Rain Showers | 0 to 5 mph NW | 23% |
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 Aug 4, 2026.