Copper Harbor, MI Weather & Growing Conditions
Tonight
43°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. Low around 43, with temperatures rising to around 49 overnight. West wind 5 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Rain Showers Likely | 5 to 20 mph W | 73% |
| Thursday | 44°F | Rain Showers | 25 to 30 mph N | 83% |
| Thursday Night | 32°F | Chance Rain And Snow Showers | 20 to 30 mph N | 47% |
| Friday | 42°F | Partly Sunny | 5 to 20 mph N | 4% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 44°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 36°F | Partly Cloudy | 5 to 15 mph W | 4% |
| Sunday | 46°F | Mostly Sunny | 15 to 20 mph W | 6% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 15 mph NW | 6% |
| Monday | 51°F | Partly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 37°F | Partly Cloudy | 10 mph W | 2% |
| Tuesday | 46°F | Mostly Sunny | 10 to 15 mph NW | 4% |
| Tuesday Night | 34°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph NW | 15% |
| Veterans Day | 45°F | Slight Chance Rain And Snow Showers | 5 to 10 mph NW | 15% |
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 Nov 5, 2026.