Ontonagon, MI has a continental climate with large seasonal temperature differences. Summers are warm to hot and humid while winters are cold with heavy snowfall. The average annual temperature in Ontonagon is around 40 degrees Fahrenheit (4 degrees Celsius). Precipitation is moderate throughout the year, with the most rain falling during summer months. In addition to regular rainfall, thunderstorms are common during summer months and can bring heavy downpours of rain. Winters can also be very chilly and can have sub-zero temperatures lasting up to several weeks at a time.
Ontonagon, Michigan gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Ontonagon averages 187 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 185 sunny days per year in Ontonagon. The US average is 205 sunny days.
Ontonagon gets some kind of precipitation, on average, 152 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 78 degrees
Winter Low: the January low is 6
Rain: averages 36 inches of rain a year
Snow: averages 187 inches of snow a year