Isle Royale Weather Forecast
- 58
- 78
Isolated Thunderstorms
- 60
- 78
Chance Rain Showers
- 53
- 78
Mostly Sunny
- 54
- 71
Slight Chance Thunderstorms
- 58
- 74
Rain Showers Likely
- 56
- 76
Chance Thunderstorms
- 53
- 73
Partly Sunny
Today 30 Jun Keweenaw
Mostly sunny. West Winds 5 to 15 Mph with Gusts up to 25 Mph.
Tonight 30 Jun Keweenaw
Mostly clear. Lows in the mid 50s. West Winds 5 to 10 Mph.
Isle Royale Temperature Statistics
June Temperature
Copper Harbor (58.4 miles)
Lowest 14 June, 2025
39.7 °FAverage June
58.1 °FHighest 22 June, 2025
84.7 °F
Climate (2020–Present)
Copper Harbor (58.4 miles)
Average Low 2020–2025
38.5 °FAverage 2020–2025
44.6 °FAverage High 2020–2025
50.8 °F