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Race Overview
The Chicago Marathon is a marathon (long-distance foot race) held every October in Chicago, Illinois. It is one of the six World Marathon Majors. Thus, it is also a World Athletics Label Road Race. The Chicago Marathon is the fourth-largest race by number of finishers worldwide.
WikipediaFAQ
When is the 2026 Chicago Marathon?
The 2026 Chicago Marathon will be held on Sunday October 11, 2026.
Is the Chicago Marathon a Boston Marathon Qualfier?
Yes, the Chicago Marathon is an official Boston Marathon qualifier.
Chicago Marathon Course Map
Loading Course Map...
Chicago Marathon Weather History
Chicago Marathon Weather Averages
Average Temp: 57°, Average Low: 49°, Average High: 66°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 51° | 54° | 57° | 60° | 62° | 63° | 64° |
| Feel | 49° | 52° | 56° | 58° | 61° | 62° | 63° |
| Rain | - | - | - | - | - | - | - |
| Wind | 7mph | 9mph | 9mph | 10mph | 10mph | 10mph | 11mph |
| Dew | 44° | 44° | 44° | 43° | 43° | 42° | 42° |
| RunScore |  | | | | | | |
Chicago Marathon 2025
Oct 12, 2025
Partly cloudy throughout the day.
Low: 51°, High: 68°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp |  52° | 55° | 59° | 62° | 64° | 66° | 67° |
| Feel | 52° | 55° | 59° | 62° | 64° | 66° | 67° |
| Rain | - | - | - | - | - | - | - |
| Wind | 5mph | 9mph | 9mph | 8mph | 6mph | 7mph | 1mph |
| Dew | 47° | 47° | 48° | 48° | 48° | 47° | 48° |
| RunScore |  | | | | | | |
Chicago Marathon 2024
Oct 13, 2024
Partly cloudy throughout the day.
Low: 52°, High: 66°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp |  59° | 60° | 60° | 61° | 63° | 66° | 66° |
| Feel | 59° | 60° | 60° | 61° | 63° | 66° | 66° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 9mph | 10mph | 10mph | 11mph | 16mph | 19mph |
| Dew | 53° | 51° | 51° | 50° | 49° | 47° | 46° |
| RunScore | | | | | |  |  |
Chicago Marathon 2023
Oct 8, 2023
Partly cloudy throughout the day.
Low: 45°, High: 55°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 47° | 50° | 51° | 54° | 55° | 55° | 54° |
| Feel | 43° | 50° | 51° | 54° | 55° | 55° | 54° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 8mph | 10mph | 9mph | 11mph | 9mph | 8mph |
| Dew | 37° | 37° | 37° | 35° | 36° | 35° | 35° |
| RunScore | | | | | | | |
Chicago Marathon 2022
Oct 9, 2022
Becoming cloudy in the afternoon.
Low: 45°, High: 70°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 46° | 50° | 54° | 59° | 63° | 66° | 68° |
| Feel | 42° | 50° | 54° | 59° | 63° | 66° | 68° |
| Rain | - | - | - | - | - | - | - |
| Wind | 9mph | 12mph | 10mph | 7mph | 9mph | 10mph | 11mph |
| Dew | 32° | 33° | 35° | 36° | 37° | 37° | 37° |
| RunScore | | | | | | | |
Chicago Marathon 2021
Oct 10, 2021
Partly cloudy throughout the day with afternoon rain.
Low: 72°, High: 81°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 72° | 72° | 73° | 75° |  74° | 74° | 75° |
| Feel | 72° | 72° | 73° | 75° | 74° | 74° | 75° |
| Rain | - | - | - | - | light | - | - |
| Wind | 13mph | 17mph | 13mph | 17mph | 15mph | 9mph | 9mph |
| Dew | 62° | 62° | 62° | 62° | 62° | 62° | 62° |
| RunScore | | | | | | | |
Chicago Marathon 2020
Oct 11, 2020
Partly cloudy throughout the day.
Low: 57°, High: 67°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 60° | 62° | 63° | 65° | 66° | 66° | 67° |
| Feel | 60° | 62° | 63° | 65° | 66° | 66° | 67° |
| Rain | - | - | - | - | - | - | - |
| Wind | 9mph | 10mph | 8mph | 6mph | 7mph | 9mph | 8mph |
| Dew | 53° | 53° | 53° | 53° | 52° | 53° | 53° |
| RunScore | | | | | | | |
Chicago Marathon 2019
Oct 13, 2019
Partly cloudy throughout the day.
Low: 39°, High: 54°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 42° | 44° | 45° | 48° | 50° | 52° | 54° |
| Feel | 36° | 37° | 38° | 41° | 50° | 52° | 54° |
| Rain | - | - | - | - | - | - | - |
| Wind | 11mph | 15mph | 18mph | 20mph | 19mph | 17mph | 21mph |
| Dew | 32° | 32° | 31° | 31° | 32° | 32° | 32° |
| RunScore | | |  | | | | |
Chicago Marathon 2018
Oct 7, 2018
Cloudy skies throughout the day with rain.
Low: 57°, High: 63°, Heavy Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 58° | 59° | 59° | 60° | 60° | 60° | 59° |
| Feel | 58° | 59° | 59° | 60° | 60° | 60° | 59° |
| Rain | - | light | light | light | - | - | - |
| Wind | 7mph | 10mph | 10mph | 10mph | 11mph | 11mph | 12mph |
| Dew | 55° | 56° | 56° | 56° | 56° | 56° | 56° |
| RunScore | | | | | | | |
Chicago Marathon 2017
Oct 8, 2017
Partly cloudy throughout the day.
Low: 55°, High: 80°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 57° | 60° | 65° | 69° | 73° | 76° | 77° |
| Feel | 57° | 60° | 65° | 69° | 73° | 76° | 77° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 4mph | 5mph | 6mph | 7mph | 12mph | 14mph |
| Dew | 54° | 55° | 55° | 55° | 54° | 50° | 49° |
| RunScore | | | | | | | |
Chicago Marathon 2016
Oct 9, 2016
Partly cloudy throughout the day.
Low: 50°, High: 63°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 52° | 54° | 56° | 58° | 60° | 62° | 63° |
| Feel | 52° | 54° | 56° | 58° | 60° | 62° | 63° |
| Rain | - | - | - | - | - | - | - |
| Wind | 8mph | 10mph | 10mph | 10mph | 12mph | 12mph | 13mph |
| Dew | 46° | 45° | 44° | 43° | 43° | 43° | 44° |
| RunScore | | | | | | | |
Chicago Marathon 2015
Oct 11, 2015
Partly cloudy throughout the day.
Low: 53°, High: 79°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 54° | 57° | 62° | 67° | 71° | 75° | 77° |
| Feel | 54° | 57° | 62° | 67° | 71° | 75° | 77° |
| Rain | - | - | - | - | - | - | - |
| Wind | 11mph | 11mph | 13mph | 14mph | 14mph | 13mph | 18mph |
| Dew | 45° | 46° | 47° | 48° | 49° | 51° | 51° |
| RunScore | | | | | | | |
Chicago Marathon 2014
Oct 12, 2014
Becoming cloudy in the afternoon with late afternoon rain.
Low: 42°, High: 63°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 44° | 49° | 53° | 57° | 60° | 62° | 62° |
| Feel | 40° | 46° | 53° | 57° | 60° | 62° | 62° |
| Rain | - | - | - | - | - | - | - |
| Wind | 6mph | 8mph | 10mph | 11mph | 11mph | 13mph | 11mph |
| Dew | 36° | 38° | 39° | 39° | 40° | 40° | 42° |
| RunScore | | | | | | | |
Chicago Marathon 2013
Oct 13, 2013
Clear conditions throughout the day with early morning rain.
Low: 46°, High: 64°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 48° | 54° | 57° | 60° | 61° | 62° | 63° |
| Feel | 47° | 54° | 57° | 60° | 61° | 62° | 63° |
| Rain | - | - | - | - | - | - | - |
| Wind | 4mph | 9mph | 9mph | 10mph | 9mph | 7mph | 8mph |
| Dew | 40° | 40° | 41° | 39° | 37° | 37° | 37° |
| RunScore | | | | | | | |
Chicago Marathon 2012
Oct 7, 2012
Partly cloudy throughout the day.
Low: 39°, High: 50°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 40° | 43° | 46° | 48° | 49° | 48° | 48° |
| Feel | 35° | 37° | 41° | 44° | 47° | 43° | 43° |
| Rain | - | - | - | - | - | - | - |
| Wind | 7mph | 10mph | 9mph | 7mph | 7mph | 11mph | 12mph |
| Dew | 29° | 28° | 27° | 25° | 24° | 21° | 20° |
| RunScore | | | | | | | |
Chicago Marathon 2011
Oct 9, 2011
Clear conditions throughout the day.
Low: 56°, High: 79°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 59° | 63° | 69° | 73° | 76° | 78° | 79° |
| Feel | 59° | 63° | 69° | 73° | 76° | 78° | 79° |
| Rain | - | - | - | - | - | - | - |
| Wind | 2mph | 1mph | 0mph | 0mph | 2mph | 5mph | 4mph |
| Dew | 49° | 51° | 52° | 51° | 49° | 48° | 48° |
| RunScore | | | | | | | |
Chicago Marathon 2010
Oct 10, 2010
Partly cloudy throughout the day.
Low: 58°, High: 83°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 60° | 65° | 72° | 76° | 81° | 83° | 83° |
| Feel | 60° | 65° | 72° | 76° | 80° | 81° | 81° |
| Rain | - | - | - | - | - | - | - |
| Wind | 1mph | 4mph | 2mph | 4mph | 4mph | 10mph | 9mph |
| Dew | 50° | 52° | 51° | 49° | 48° | 47° | 48° |
| RunScore | | | | | | | |
Chicago Marathon 2009
Oct 11, 2009
Partly cloudy throughout the day.
Low: 29°, High: 44°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 32° | 34° | 36° | 38° | 40° | 42° | 43° |
| Feel | 26° | 27° | 29° | 33° | 35° | 38° | 41° |
| Rain | - | - | - | - | - | - | - |
| Wind | 6mph | 8mph | 9mph | 7mph | 7mph | 6mph | 4mph |
| Dew | 22° | 22° | 20° | 20° | 19° | 19° | 18° |
| RunScore | | | | | | | |
Chicago Marathon 2008
Oct 12, 2008
Partly cloudy throughout the day.
Low: 62°, High: 84°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 62° | 66° | 70° | 75° | 78° | 82° | 83° |
| Feel | 62° | 66° | 70° | 75° | 78° | 81° | 82° |
| Rain | - | - | - | - | - | - | - |
| Wind | 3mph | 6mph | 8mph | 8mph | 4mph | 6mph | 7mph |
| Dew | 56° | 56° | 56° | 56° | 56° | 57° | 57° |
| RunScore | | | | | | | |
Chicago Marathon 2007
Oct 7, 2007
Partly cloudy throughout the day.
Low: 70°, High: 88°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 71° | 75° | 79° | 82° | 84° | 86° | 86° |
| Feel | 71° | 75° | 79° | 85° | 87° | 88° | 88° |
| Rain | - | - | - | - | - | - | - |
| Wind | 4mph | 5mph | 7mph | 6mph | 9mph | 5mph | 7mph |
| Dew | 65° | 66° | 67° | 67° | 68° | 66° | 66° |
| RunScore | | | | | | | |
Chicago Marathon 2006
Oct 22, 2006
Cloudy skies throughout the day with rain clearing later.
Low: 35°, High: 48°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 38° | 38° | 38° | 39° | 40° | 40° | 40° |
| Feel | 30° | 30° | 30° | 31° | 33° | 33° | 32° |
| Rain | - | - | light | - | - | - | - |
| Wind | 14mph | 13mph | 14mph | 13mph | 10mph | 12mph | 14mph |
| Dew | 34° | 34° | 35° | 34° | 34° | 32° | 31° |
| RunScore | | | | | | | |
Chicago Marathon 2005
Oct 9, 2005
Clearing in the afternoon.
Low: 50°, High: 59°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 51° | 52° | 54° | 56° | 57° | 57° | 58° |
| Feel | 51° | 52° | 54° | 56° | 57° | 57° | 58° |
| Rain | - | - | - | - | - | - | - |
| Wind | 7mph | 9mph | 11mph | 14mph | 16mph | 13mph | 12mph |
| Dew | 43° | 43° | 43° | 43° | 43° | 43° | 43° |
| RunScore | | | | | | | |
Chicago Marathon 2004
Oct 10, 2004
Partly cloudy throughout the day.
Low: 45°, High: 61°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 50° | 54° | 59° | 59° | 61° | 61° | 61° |
| Feel | 48° | 54° | 59° | 59° | 61° | 61° | 61° |
| Rain | - | - | - | - | - | - | - |
| Wind | 5mph | 7mph | 15mph | 11mph | 10mph | 14mph | 13mph |
| Dew | 45° | 45° | 43° | 42° | 43° | 43° | 41° |
| RunScore | | | | | | | |
Chicago Marathon 2003
Oct 12, 2003
Clear conditions throughout the day with early morning rain.
Low: 47°, High: 70°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 48° | 53° | 57° | 61° | 64° | 66° | 68° |
| Feel | 44° | 53° | 57° | 61° | 64° | 66° | 68° |
| Rain | - | - | - | - | - | - | - |
| Wind | 9mph | 10mph | 10mph | 12mph | 12mph | 14mph | 15mph |
| Dew | 45° | 45° | 45° | 43° | 41° | 39° | 37° |
| RunScore | | | | | | | |
Chicago Marathon 2002
Oct 13, 2002
Clear conditions throughout the day.
Low: 39°, High: 52°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 39° | 41° | 43° | 45° | 46° | 47° | 48° |
| Feel | 32° | 32° | 35° | 37° | 39° | 40° | 43° |
| Rain | - | - | - | - | - | - | - |
| Wind | 10mph | 17mph | 15mph | 17mph | 16mph | 16mph | 12mph |
| Dew | 27° | 27° | 25° | 22° | 20° | 21° | 22° |
| RunScore | | | | | | | |
Chicago Marathon 2001
Oct 7, 2001
Partly cloudy throughout the day.
Low: 33°, High: 52°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 35° | 41° | 45° | 46° | 50° | 50° | 52° |
| Feel | 35° | 41° | 42° | 43° | 48° | 48° | 52° |
| Rain | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 5mph | 7mph | 5mph | 6mph | 6mph |
| Dew | 28° | 27° | 26° | 20° | 22° | 25° | 24° |
| RunScore | | | | | | | |
Chicago Marathon 2000
Oct 22, 2000
Becoming cloudy in the afternoon.
Low: 53°, High: 68°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM |
|---|---|---|---|---|---|---|---|
| Temp | 54° | 56° | 58° | 63° | 63° | 65° | 68° |
| Feel | 54° | 56° | 58° | 63° | 63° | 65° | 68° |
| Rain | - | - | - | - | - | - | - |
| Wind | 7mph | 7mph | 6mph | 5mph | 4mph | 4mph | 5mph |
| Dew | 49° | 49° | 51° | 52° | 52° | 54° | 54° |
| RunScore | | | | | | | |