Mass City, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mass City, a community in Ontonagon County, Michigan.
Overnight
46°F
Partly Cloudy
Partly cloudy, with a low around 46. Southeast wind around 5 mph.
7-day forecast for Mass City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Partly Cloudy | 5 mph SE | 4% |
| Saturday | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 15% |
| Saturday Night | 47°F | Mostly Cloudy | 0 to 5 mph NE | 10% |
| Sunday | 64°F | Partly Sunny | 5 to 10 mph NE | 12% |
| Sunday Night | 38°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Monday | 62°F | Partly Sunny | 0 to 5 mph E | 0% |
| Monday Night | 34°F | Mostly Clear | 0 to 5 mph E | 0% |
| Tuesday | 66°F | Sunny | 0 to 5 mph E | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph E | 0% |
| Wednesday | 69°F | Sunny | 0 to 5 mph SE | 0% |
| Wednesday Night | 40°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 70°F | Sunny | 0 to 5 mph E | 1% |
| Thursday Night | 43°F | Mostly Clear | 0 to 5 mph SE | 3% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Mass City (46.762, -89.085). Updated through the day.
Growing snapshot for Mass City
Last spring frost
May 23
First fall frost
Oct 1
Growing season
128 days
Hardiness zone
5a
More local growing data for Mass City: nearby ZIP 49929 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Greenland 6N, Mi (5.2 mi from Mass City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.