Gwinn, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gwinn, a community in Marquette County, Michigan.
Tonight
56°F
Rain Showers
Rain showers and patchy fog. Cloudy, with a low around 56. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Gwinn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Rain Showers | 5 to 10 mph S | 88% |
| Wednesday | 61°F | Rain Showers | 5 to 10 mph S | 97% |
| Wednesday Night | 46°F | Rain Showers Likely | 5 to 10 mph S | 70% |
| Thursday | 50°F | Rain Showers | 5 to 15 mph NW | 99% |
| Thursday Night | 32°F | Rain Showers | 15 to 20 mph N | 97% |
| Friday | 41°F | Chance Rain Showers | 10 to 15 mph N | 25% |
| Friday Night | 27°F | Mostly Cloudy | 0 to 10 mph NW | 14% |
| Saturday | 46°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 5% |
| Sunday | 50°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph NW | 15% |
| Sunday Night | 32°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph W | 15% |
| Monday | 52°F | Partly Sunny | 5 to 10 mph SW | 4% |
| Monday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 5% |
| Tuesday | 51°F | Mostly Sunny | 10 mph NW | 6% |
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.