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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
45°F
Mostly Cloudy
Mostly cloudy, with a low around 45. Southeast wind around 5 mph.

7-day forecast for Mass City

WhenTempForecastWindPrecip
Overnight 45°F Mostly Cloudy 5 mph SE 6%
Saturday 68°F Mostly Sunny 0 to 5 mph E 8%
Saturday Night 46°F Mostly Cloudy 0 to 5 mph NE 4%
Sunday 63°F Partly Sunny 0 to 10 mph NE 4%
Sunday Night 39°F Mostly Cloudy 0 to 5 mph E 0%
Monday 62°F Partly Sunny 0 to 5 mph E 0%
Monday Night 36°F Partly Cloudy 0 to 5 mph E 0%
Tuesday 65°F Patchy Frost then Sunny 0 to 5 mph E 0%
Tuesday Night 38°F Mostly Clear 0 to 5 mph E 1%
Wednesday 68°F Sunny 0 to 5 mph SE 3%
Wednesday Night 42°F Partly Cloudy 0 to 5 mph SE 3%
Thursday 70°F Mostly Sunny 0 to 5 mph SW 2%
Thursday Night 45°F Partly Cloudy 0 mph 5%
Friday 72°F Mostly Sunny 0 to 5 mph W 5%

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

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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.