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Mackinac Island, MI Weather


Mackinac Island, MI climate is mild during summer when temperatures tend to be in the 60's and extremely cold during winter when temperatures tend to be in the 10's.

The warmest month of the year is July with an average maximum temperature of 75.20 degrees Fahrenheit, while the coldest month of the year is February with an average minimum temperature of 11.90 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 15 degrees Fahrenheit, and fairly limited during winter with an average difference of 14 degrees Fahrenheit.

The annual average precipitation at Mackinac Island is 26.53 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is September with an average rainfall of 3.09 Inches.

Weather Data

Normal Climate

Normal Temperatures

(ST IGNACE MACKINAC BR Weather station, 4.87 miles from Mackinac Island)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 24.8 26.4 35.0 46.8 59.7 69.3 75.2 74.3 65.6 53.7 40.9 30.4 50.2
Mean °F 18.5 19.2 27.7 39.4 51.3 61.1 67.4 67.0 58.6 47.7 36.2 25.6 43.3
Min °F 12.2 11.9 20.3 31.9 42.8 52.9 59.6 59.7 51.6 41.6 31.5 20.7 36.4

Normal Precipitation

(ST IGNACE MACKINAC BR Weather station, 4.87 miles from Mackinac Island)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 1.68 1.01 1.60 2.00 2.44 2.51 2.72 2.58 3.09 2.89 2.39 1.62 26.53