Big Bay, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Bay, a community in Marquette County, Michigan.
Today
82°F
Chance Rain Showers
A chance of rain showers before 3pm. Mostly cloudy. High near 82, with temperatures falling to around 77 in the afternoon. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast for Big Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Chance Rain Showers | 10 to 15 mph NW | 25% |
| Tonight | 62°F | Mostly Cloudy | 5 to 10 mph W | 4% |
| Wednesday | 78°F | Mostly Sunny | 5 mph NW | 0% |
| Wednesday Night | 62°F | Mostly Clear | 5 to 10 mph SE | 0% |
| Thursday | 86°F | Sunny | 5 to 10 mph S | 2% |
| Thursday Night | 70°F | Mostly Clear | 10 to 15 mph S | 2% |
| Friday | 89°F | Sunny then Chance Showers And Thunderstorms | 10 to 15 mph SW | 28% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 10 mph SW | 28% |
| Saturday | 78°F | Mostly Sunny then Chance Showers And Thunderstorms | 10 mph NW | 29% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 40% |
| Sunday | 78°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 38% |
| Sunday Night | 62°F | Chance Rain Showers | 5 to 10 mph W | 29% |
| Monday | 75°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 16% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 20% |
Forecast source: National Weather Service (api.weather.gov) for Big Bay (46.817, -87.708). Updated through the day.
Growing snapshot for Big Bay
Last spring frost
May 22
First fall frost
Oct 6
Growing season
137 days
Hardiness zone
5b
More local growing data for Big Bay: nearby ZIP 49808 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Gwinn
Harvey
Ishpeming
K. I. Sawyer
Marquette
Michigamme
Negaunee
Palmer
Republic
Rock
Trowbridge Park
West Ishpeming
Climate data from the nearest NOAA station, Big Bay 1Nw, Mi (4.9 mi from Big Bay). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.