Copper Harbor, MI Weather & Growing Conditions
Today
76°F
Chance Rain Showers then Partly Sunny
A chance of rain showers between 9am and noon. Partly sunny. High near 76, with temperatures falling to around 73 in the afternoon. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph W | 28% |
| Tonight | 63°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Wednesday | 76°F | Sunny | 5 mph W | 0% |
| Wednesday Night | 66°F | Mostly Clear | 5 mph S | 0% |
| Thursday | 82°F | Sunny | 5 to 10 mph S | 2% |
| Thursday Night | 70°F | Mostly Clear | 5 to 10 mph S | 5% |
| Friday | 86°F | Sunny | 5 to 10 mph SW | 14% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Saturday | 81°F | Slight Chance Rain Showers | 5 mph W | 24% |
| Saturday Night | 66°F | Chance Rain Showers | 5 mph W | 38% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 5 mph W | 29% |
| Sunday Night | 65°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph W | 19% |
| Monday | 79°F | Partly Sunny | 5 mph W | 9% |
| Monday Night | 63°F | Mostly Cloudy | 0 to 5 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Copper Harbor, MI
Last spring frost
May 20
First fall frost
Oct 15
Growing season
148 days
Hardiness zone
6a
Explore more for Copper Harbor, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Copper Harbor Ft Wilkins, Mi (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.