(CBS) — It is a warm, breezy day for the thousands of runners in the 2015 Chicago Marathon.

Sunday’s high is 78 degrees, well above the norm for this time of year in the mid 60s. The day will be mostly sunny and will be windy, with gusts up to 30 miles per hour.

Monday still be on the warm side with a high if 73 degrees before cooling off on Tuesday with a high of 62 degrees.