Get updates on the Illinois Marathon race forecast and be the first to know if the forecast shifts.
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Partly cloudy throughout the day.
We don't have course map data for Illinois Marathon yet. If you have a GPX file (or other format) for this race, we'd love to add it!
Ask a question about the Illinois Marathon and we'll do the hard part and find the answer for you within 48 hours.
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Range of temperatures during race hours for each year.
Partly cloudy throughout the day with rain.
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