January weather forecast
Isle Royale National Park, MI

January in Isle Royale National Park, Michigan, witnesses winter at its peak. The chilly weather continues from December, making it the coldest month of the year. Surprisingly, despite the cold, a moderate amount of rainfall is observed with precipitation for 10 days. The temperatures lie between 0°F (-17.8°C) and 18°F (-7.8°C), marking the lowest point for the year. The chilly winds, combined with scarce sunlight of approximately 8.9 hours a day, contribute to the freezing atmosphere.

Temperature

The coldest period in Isle Royale National Park, Michigan, is January, when temperatures fluctuate between an average high of 17.6°F (-8°C) and a low of -0.4°F (-18°C).

Rainfall

In January, in Isle Royale National Park, the rain falls for 10 days. Throughout January, 2.48" (63mm) of precipitation is accumulated. Throughout the year, there are 125 rainfall days, and 30.55" (776mm) of precipitation is accumulated.

Ocean temperature

The months with the coldest seawater are January through April, with an average ocean temperature of 35.6°F (2°C).
Note: In the activity of swimming, this state poses an instant danger to life. Breathing control is completely lost, impeding any form of clear thinking. Employing a specialized swimsuit is crucial to minimize thermal loss.

Daylight

The average length of the day in January is 8h and 55min.
On the first day of the month, sunrise is at 8:45 am and sunset at 5:12 pm. On the last day of January, sunrise is at 8:24 am and sunset at 5:53 pm EST.

Sunshine

The average sunshine in January in Isle Royale National Park is 4h.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Isle Royale National Park. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In January, a daily maximum UV index of 1 leads to the following instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.