Grinnell Memorial Nature Sanctuary Weather Forecast
- 37
- 46
Mostly Cloudy
- 37
- 49
Partly Sunny
- 37
- 51
Partly Sunny
- 38
- 53
Partly Sunny
- 40
- 55
Partly Sunny
- 43
- 57
Mostly Sunny
Today 23 May Keweenaw
Cool. Mostly cloudy with a 20 percent chance of rain Showers. Highs 47 to 52 inland to around 44 at the shore. North Winds 5 to 15 Mph.
Tonight 23 May Keweenaw
Mostly cloudy with a slight chance of Sprinkles. Lows around 38. Light north Winds.
Grinnell Memorial Nature Sanctuary Temperature Statistics
May Temperature
Copper Harbor (4.3 miles)
Lowest 8 May, 2025
33.7 °FAverage May
50.2 °FHighest 13 May, 2025
82.7 °F
Climate (2020–Present)
Copper Harbor (4.3 miles)
Average Low 2020–2025
38.6 °FAverage 2020–2025
44.7 °FAverage High 2020–2025
50.8 °F