Long Lake Weather Forecast
- 53
- 60
Mostly Cloudy
- 54
- 64
Slight Chance Rain Showers
- 57
- 67
Rain Showers Likely
- 57
- 70
Chance Thunderstorms
- 56
- 70
Chance Rain Showers
- 55
- 67
Mostly Cloudy
Today 18 Sep Keweenaw
Partly cloudy and cooler. Near steady temperature in the upper 50s. Northeast Winds 5 to 15 Mph.
Tonight 18 Sep Keweenaw
Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 51. East Winds 5 to 10 Mph.
Long Lake Temperature Statistics
September Temperature
Copper Harbor (14.3 miles)
Lowest 4 September, 2025
46.9 °FAverage September
59.5 °FHighest 15 September, 2025
78.1 °F
Climate (2020–Present)
Copper Harbor (14.3 miles)
Average Low 2020–2025
38.5 °FAverage 2020–2025
44.7 °FAverage High 2020–2025
50.9 °F