Gwinn, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gwinn, a community in Marquette County, Michigan.
This Afternoon
62°F
Mostly Cloudy
Mostly cloudy, with a high near 62. Northeast wind around 5 mph.
7-day forecast for Gwinn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Mostly Cloudy | 5 mph NE | 2% |
| Tonight | 42°F | Mostly Cloudy | 0 to 5 mph E | 7% |
| Saturday | 66°F | Mostly Sunny | 0 to 5 mph SE | 9% |
| Saturday Night | 46°F | Mostly Cloudy | 0 to 5 mph NE | 7% |
| Sunday | 62°F | Partly Sunny | 5 to 15 mph N | 2% |
| Sunday Night | 39°F | Mostly Cloudy | 5 to 15 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Monday Night | 36°F | Partly Cloudy then Patchy Frost | 0 to 10 mph NE | 0% |
| Tuesday | 63°F | Patchy Frost then Mostly Sunny | 0 to 10 mph NE | 0% |
| Tuesday Night | 38°F | Mostly Clear | 0 to 10 mph E | 3% |
| Wednesday | 66°F | Sunny | 0 to 10 mph E | 4% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph SE | 4% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 2% |
| Thursday Night | 44°F | Partly Cloudy | 0 to 5 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Gwinn (46.285, -87.442). Updated through the day.
Growing snapshot for Gwinn
Last spring frost
May 13
First fall frost
Oct 2
Growing season
141 days
Hardiness zone
5a
More local growing data for Gwinn: nearby ZIP 49841 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Big Bay
Harvey
Ishpeming
K. I. Sawyer
Marquette
Michigamme
Negaunee
Palmer
Republic
Rock
Trowbridge Park
West Ishpeming
Climate data from the nearest NOAA station, Ki Sawyer Wwtp, Mi (7.4 mi from Gwinn). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.