Munising, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Munising, a city in Alger County, Michigan.
Today
79°F
Partly Sunny then Showers And Thunderstorms Likely
Showers and thunderstorms likely after 2pm. Partly sunny. High near 79, with temperatures falling to around 67 in the afternoon. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Munising
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Partly Sunny then Showers And Thunderstorms Likely | 5 to 10 mph W | 66% |
| Tonight | 59°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph NW | 34% |
| Wednesday | 73°F | Mostly Sunny | 0 to 5 mph NW | 6% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 5 mph E | 1% |
| Thursday | 80°F | Sunny | 5 to 10 mph S | 2% |
| Thursday Night | 63°F | Mostly Clear | 10 mph S | 2% |
| Friday | 86°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph S | 39% |
| Saturday | 79°F | Slight Chance Showers And Thunderstorms | 5 mph W | 34% |
| Saturday Night | 62°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 41% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 5 mph SW | 35% |
| Monday | 76°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph NW | 16% |
| Monday Night | 58°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 20% |
Forecast source: National Weather Service (api.weather.gov) for Munising (46.431, -86.619). Updated through the day.
Growing snapshot for Munising
Last spring frost
May 16
First fall frost
Oct 14
Growing season
148 days
Hardiness zone
5b
More local growing data for Munising: nearby ZIP 49862 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Munising, Mi (3.2 mi from Munising). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.