Gwinn, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gwinn, a community in Marquette County, Michigan.
Today
62°F
Rain Showers
Rain showers and patchy fog. Mostly cloudy. High near 62, with temperatures falling to around 59 in the afternoon. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Gwinn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Rain Showers | 10 mph S | 85% |
| Tonight | 44°F | Rain Showers Likely | 10 mph S | 61% |
| Thursday | 49°F | Rain Showers | 5 to 20 mph NW | 89% |
| Thursday Night | 29°F | Rain And Snow Showers | 15 to 20 mph N | 89% |
| Friday | 40°F | Chance Rain And Snow Showers | 10 to 15 mph N | 48% |
| Friday Night | 25°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 10 mph N | 16% |
| Saturday | 45°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 28°F | Partly Cloudy | 5 mph W | 7% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 9% |
| Sunday Night | 30°F | Partly Cloudy | 5 to 10 mph W | 9% |
| Monday | 53°F | Partly Sunny | 5 to 10 mph SW | 6% |
| Monday Night | 34°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Tuesday | 51°F | Slight Chance Rain Showers | 5 to 10 mph NW | 15% |
| Tuesday Night | 30°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 15% |
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 Nov 4, 2026.