Days of Sunshine Per Year in Michigan

Number of Sunny Days

In the table below, the average number of Sunny Days for a city in Michigan is the total days in a year when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.

Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.

Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are annual averages, made from years of weather watching.

Annual days of sunshine
City Sunny Partly Sunny Total Days
With Sun
Alpena 67 104 171
Detroit 75 105 180
Flint 66 105 171
Grand Rapids 64 96 160
Houghton Lake 65 100 165
Lansing 71 104 175
Muskegon 75 88 163
Sault Ste Marie 66 90 156

Amount of Sun

Here's another way to look at how much sunshine a city gets. The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are yearly averages based on many years of weather observations.

Percent sunshine yearly
City % Sun
Alpena 48
Detroit 53
Grand Rapids 46
Lansing 51
Marquette 51
Sault Ste Marie 47

National Climatic Data Center. Comparative Climatic Data.

Michigan Sunshine
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