Copper Harbor, MI Weather & Growing Conditions
This Afternoon
62°F
Partly Sunny
Partly sunny, with a high near 62. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Partly Sunny | 5 mph SE | 1% |
| Tonight | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 10 mph SE | 21% |
| Sunday | 58°F | Partly Sunny | 15 mph NE | 6% |
| Sunday Night | 45°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 5 to 10 mph E | 0% |
| Monday Night | 43°F | Mostly Clear | 5 mph E | 0% |
| Tuesday | 59°F | Sunny | 5 to 10 mph E | 0% |
| Tuesday Night | 49°F | Mostly Clear | 5 mph SE | 0% |
| Wednesday | 60°F | Sunny | 5 to 10 mph SE | 0% |
| Wednesday Night | 50°F | Mostly Clear | 5 to 10 mph SE | 1% |
| Thursday | 62°F | Sunny | 5 to 10 mph SE | 2% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph SE | 2% |
| Friday | 65°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph S | 1% |
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 Sep 20, 2026.