Temps Expected To Warm Up For Sunday's Chicago Marathon

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(CBS) -- Temperatures on Saturday are expected to be around normal for this time of year with plenty of sunshine before a warm-up on Sunday for the Chicago Marathon.

Saturday will be mostly sunny with a high of 66 degrees, just above the normal high of 65. Temperatures will dip to 54 degrees in the overnight hours.

Sunday is also expected have plenty of sunshine and warmer temperatures, with a high of 78 degrees.