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2017 Chicago Marathon Weather

Location Time Temperature Humidity Dewpoint Wind Conditions
Start 7:30am 56°F 91% 53°F 3mph SW Sunny
Halfway 8:30am 60°F 89% 56°F 3mph SSW Sunny
Finish 9:30am 64°F 82% 59°F 3mph SSW Sunny

Wind Direction

Tailwind: 4% of the Course
Headwind: 31% of the Course