Michigan Climate and Weather
The Great Lakes influence the climate by generally warming the winters and cooling the summers, creating more moderate temperatures in relation to other areas. The lakes also create more humidity and moisture throughout the year. Snowfall is sometimes heavy (called Lake Effect Snow) and Lake Michigan has a history of icing over. The north generally experiences cooler weather compared to the south, but the climate in Michigan is unpredictable and changes rapidly particularly during the spring and autumn months.
“Lake Michigan’s sandy eastern shore has beautiful dunes and beaches, summer water temperatures in the mid-60s to low 70s and summer weather approaching perfection (in contrast to the gray and cold winters). Summer air temperatures rarely surpass 90 degrees and humidity is low. Still, Canadian cold fronts can arrive swiftly, so pack a light jacket – even for the dog days of summer.” — Canoe Canada
South Haven averages 34 inches of rain per year. The U.S. average is 37. Average snowfall is 50 inches. The average number of days per year with measurable precipitation is 122.
Summer sun is plentiful – with around 169 sunny days per year. July is the warmest month with an average high temperature around 80 degrees. Winter temps average 20 °. Our comfort index, which is based on humidity during the hot months, is a 47 out of 100, where higher is more comfortable. The U.S. average on the comfort index is 44.