Isle Royale National Park Weather Forecast
- 40
- 45
Mostly Cloudy
- 17
- 45
Rain Showers
- 18
- 27
Mostly Cloudy
- 23
- 32
Mostly Cloudy
- 21
- 33
Chance Snow Showers
- 19
- 30
Chance Snow Showers
Today 14 Mar Keweenaw
A slight chance of Thunderstorms in the morning. Mostly cloudy with a slight chance of rain Showers. Warmer with Highs in the upper 40s. Southeast Winds 5 to 10 Mph, becoming east 5 to 15 Mph in the afternoon. Chance of rain 20 percent.
Tonight 14 Mar Keweenaw
Partly cloudy in the Evening, then mostly cloudy with a chance of rain Showers with a slight chance of Thunderstorms after midnight. Lows around 37 inland to around 43 at the shore. East Winds 5 to 15 Mph, becoming southeast 5 to 10 Mph with Gusts up to 30 Mph after midnight. Chance of rain 50 percent.
Isle Royale National Park Temperature Statistics
March Temperature
Copper Harbor (60.3 miles)
Lowest 8 March, 2025
7 °FAverage March
28.9 °FHighest 9 March, 2025
52 °F
Climate (2020–Present)
Copper Harbor (60.3 miles)
Average Low 2020–2025
38.6 °FAverage 2020–2025
44.6 °FAverage High 2020–2025
50.7 °F