It's Memorial Day, Chicago, and honestly, it's a mixed bag. The post-storm air is fresh, but the city's still shaking off a weekend of festivities, leaving behind some lingering headaches.
- The oppressive humidity from last week is gone, replaced by clear skies and temperatures in the low 10s°C (50s°F), making for some genuinely pleasant running weather.
- AQI and pollen levels are both moderate, so most of you should be breathing easy, though if you're sensitive, you might still feel a little something.
- Expect increased crowds everywhere, especially near parks and beaches, because, well, it's a holiday and everyone wants to be outside.
- Lingering street and sidewalk closures from the Sueños festival around Grant Park and parts of the Lakefront Trail are still a pain in the asphalt.
The weather today is finally cooperating after some wild swings and thunderstorms over the weekend. We're looking at a clear day with a brisk wind and temperatures hovering around 11.9°C (53.4°F). This is prime running weather, folks – cool, crisp, and no oppressive humidity to contend with. Your lungs will thank you for the fresh air.
However, it wouldn't be Chicago without some obstacles, especially on a holiday weekend. The Sueños music festival wrapped up yesterday in Grant Park, but many of the associated street and sidewalk closures aren't going anywhere just yet. You can bet your last gels that Balbo Drive, Columbus Drive, and Ida B. Wells/Congress Circle are still a mess, though city officials claim most should be clear by midnight tonight. Key parts of Balbo Drive and even some sections of the DuSable Lake Shore Drive southbound sidewalk from Buckingham Fountain to Roosevelt Road are still closed until later this week.
Grant Park and Lakefront Trail Users Beware: Don't assume everything is open just because the festival is over. Double-check closures, especially around Balbo and Columbus, as some sections, including parts of the Lakefront Trail's adjacent sidewalks, are still impacted through May 26th or even May 30th. Expect detours and added congestion from fellow Memorial Day revelers.
On top of the event fallout, remember that Chicago construction season is in full swing. We're talking Stevenson Expressway reconstruction, Dan Ryan resurfacing, and I-290/Eisenhower extension work. While these are primarily vehicle arteries, it means more traffic on surface streets and potential impacts on pedestrian and cycling routes near interchanges. Cook County also has major transportation improvement programs, including new shared-use path construction, which will undoubtedly create localized detours.
Pollen Breakdown (Moderate):
| Pollen Type | Level (Moderate) |
|---|---|
| Trees | Medium |
| Grass | Medium |
| Weeds | Low |
If you're heading out for a run or ride, plan your route strategically. Consider sticking to routes further from downtown's lingering closures, or be prepared for reroutes and heavy foot traffic if you insist on hitting the Lakefront Trail near Grant Park. And as always, watch out for our city's notoriously aggressive drivers, especially with holiday traffic in the mix.
Data grounded with National Weather Service, AccuWeather, ABC7, NRIPage, and Heavy Duty Trucking Magazine from May 23-25, 2026.