Sumner Lake Weather Forecast
- 25
- 40
Chance Rain/Snow
- 26
- 31
Mostly Cloudy
- 28
- 33
Chance Snow Showers
- 31
- 35
Chance Rain Showers
- 36
- 41
Slight Chance Rain Showers
- 33
- 40
Mostly Cloudy
Today 7 Nov Keweenaw
Breezy. Cloudy with a chance of snow Showers. Rain Showers likely in the Morning, then a slight chance of rain Showers in the afternoon. Little or no snow accumulation. Highs 41 to 46. Temperature falling into the lower 30s in the afternoon. North Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of precipitation 60 percent.
Tonight 7 Nov Keweenaw
Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 24. North Winds 5 to 15 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph with Gusts up to 20 Mph after midnight.
Sumner Lake Temperature Statistics
November Temperature
Copper Harbor (53.4 miles)
Lowest 1 November, 2025
32 °FAverage November
44.1 °FHighest 4 November, 2025
52 °F
Climate (2020–Present)
Copper Harbor (53.4 miles)
Average Low 2020–2025
38.7 °FAverage 2020–2025
44.9 °FAverage High 2020–2025
51.1 °F