Weather Forecast and Radar for Marathon, Ontario

Weather in Marathon, ON

Marathon, Ontario is located in Northern Ontario, on the northern shore of Lake Superior. It has a humid continental climate, meaning it experiences four distinct seasons.

In the spring, temperatures in Marathon start to warm up. Average daytime highs in April and May range from 3 to 8 degrees Celsius, with overnight lows typically ranging from -5 to 0 degrees Celsius. April and May are usually the wettest months with average rainfall of around 70 millimetres.

In the summer months of June, July, and August, temperatures rise and average daytime highs range from 16 to 23 degrees Celsius. Overnight lows range from 5 to 10 degrees Celsius. During these months, Marathon experiences more sunshine and less precipitation with average rainfall of around 40 millimetres.

The fall months of September, October, and November bring cooler temperatures. Daytime highs average between 5 and 10 degrees Celsius while overnight lows range from -3 to 2 degrees Celsius. Rainfall remains relatively low in the fall, with an average of around 50 millimetres.

Winter months in Marathon are cold and snowy. Average daytime highs in December, January, and February range from -7 to -2 degrees Celsius, while overnight lows range from -14 to -8 degrees Celsius. During these months, precipitation increases with an average of around 80 millimetres of snowfall.

Fast Facts About Marathon, ON

As of 2020, the city population is 3273.

Major Cities Nearby Marathon, ON

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Marathon, Ontario.