Fox Valley Marathon

St. Charles, IL, USA · September 20, 2026
clear-day44°·63° high·Breezy·Dry
8
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Race Day Weather

clear-day
44°at start
63° high
Breezy
Dry

Cool start, warming up later

Runners will face a starting temperature of 45°F, rising to 63°F by the finish. Winds will be from the WSW at 11 mph, with gusts up to 21 mph, providing a headwind throughout. With average humidity at 68%, pacing adjustments are recommended as temperatures rise; hydration should be prioritized.

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Pace Calculator

Distance: 26.2mi
0:00:00
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Race Info

Combining small race atmosphere with big race amenities, the Fox Valley Marathon, Half Marathon, and Fall Final 20 are ideal for both veterans looking for a fast race, as well as first timers looking for an uncrowded, supportive, family-friendly race setting. Starting and ending in historic downtown St Charles, IL, the course winds through picturesque Geneva, Batavia, North Aurora, and Aurora to a spectacular finish across the Fox River that can be seen from over a mile away. The course offers fantastic viewing spots for families and supporters, as well as frequent and well positioned aid stations that are staffed by the most supportive volunteer teams of any race you’ve run. Source

FAQ

When is the 2026 Fox Valley Marathon?

The 2026 Fox Valley Marathon will be held on Sunday September 20, 2026.

Is the Fox Valley Marathon a Boston Marathon Qualifier?

Yes, the Fox Valley Marathon is an official Boston Marathon qualifier.

What is the time limit for the Fox Valley Marathon?

The time limit for the Fox Valley Marathon is 6 hours.

What will the weather be like for the 2026 Fox Valley Marathon?

The forecast calls for a high of 63°F and a low of 44°F with a 26% chance of rain.

Historical Weather

Based on 15 years of data
Avg Temp
73°F
L:59° H:73°
RunScore
7
Conditions
Rain Freq
27%
4 of 15 yrs
Wind9mph
Dew58°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
66°/78°-
8
2024
partly-cloudy-day
67°/72°Light
7
2023
rain
59°/64°Light
6
2022
cloudy
69°/81°-
7
2021
clear-day
59°/86°-
7
2019
cloudy
72°/78°Light
7
2018
clear-day
65°/85°-
7
2017
partly-cloudy-day
67°/82°-
7
2016
clear-day
55°/75°-
8
2015
clear-day
48°/70°-
8
2014
clear-day
55°/63°-
7
2013
clear-day
43°/66°-
8
2012
clear-day
47°/75°-
8
2011
cloudy
54°/59°Light
7
2010
partly-cloudy-day
53°/67°-
9