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Keweenaw National Historical Park - ClimateLake Superior controls the weather of the Keweenaw year around. Early summer can be quite cool, especially near the Lake. By mid-summer, temperatures are usually mild, with daytime highs in the mid to upper 70"s (F) and cool nights. September and October normally continue quite mild. Colors peak from the last week of September to the first week of October; brief, light snows may occur, but the temperature quickly warms up, moderated by the waters of Lake Superior at their warmest annual level. Winter settles in from mid to late November with the arrival of accumulating snowfalls. The ground is normally covered from Thanksgiving to Easter. Lake Superior"s gradually cooling waters create an average annual snowfall which ranges from about 180 inches to 250 inches in different parts of the Peninsula. While creating abundant snowfall, the relatively warm Lake waters keep temperatures much milder than in surrounding areas of Minnesota and Ontario. |
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Keweenaw National Historical Park - Climate
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