What is the weather usually like on race day for the Summer Sizzler - Greater Chicago?

Based on the last 10 years of weather data for Wheaton, IL, August race mornings typically start near 66°F and warm to around 79°F. On this calendar date it has rained in 1 of the last 10 years.

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Summer Sizzler - Greater Chicago

Wheaton, IL

Sun, Aug 22, 2027

In 294 days · Sun, Aug 22, 2027

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When

Sunday, August 22nd, 2027

Where

Danada Forest Preserve, Wheaton IL

Distances

1 Mile · 5K · 10K · 15K

Typical weather

66–79°F · some rain risk

See last 10 years

On this date: rain 1 of the last 10 years

2026

67–78°F

dry

2025

65–78°F

dry

2024

53–76°F

dry

2023

68–80°F

dry

2022

64–74°F

dry

2021

67–75°F

dry

2020

63–87°F

dry

2019

66–74°F

dry

2018

61–77°F

dry

2017

66–79°F

rain

Best months to race in Illinois →

About this race

Join us for the annual Summer Sizzler 5k/10k/15k! A fun summer event that is perfect for the whole family. The fun includes -

Great Swag - designer shirt & custom medal
Chip-timing with live results and awards
Free photos
Delicious Treats waiting at the finish line
FREE Kona Ice
Plenty of fun!

Grab your friends and family, you are not going to want to miss this one! Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag! *Youth-based pricing for the 5k/10k, 12 & Under are only $17!

5k/10k/15K registration includes a custom bib, designer shirt, and a custom finisher medal!
1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal!
The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specifically crafted medal for our kids' dash event! (If your child wants to run the kid's dash, and doesn't want the SWAG, they are welcome to run with us on race day for free!)

*Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt! 🏁🏅Create a team, or join an existing team during registration. Once 4 people have registered on that team, all team members will be refunded $5, once ten people register another $5 will be refunded for a total of $10!