Lollapalooza Chicago 2026 Nice-Weather Probability

Now that Lollapalooza Chicago is behind us, looking back at the weather reveals a weekend of two halves that was much wetter than a typical Chicago summer. We started off with a dream of a Thursday that felt like 31°C in the sun, making it the clear standout for sunscreen and tank tops. Friday took a turn when a proper downpour of 12.4mm rolled through, but Saturday was the real test of endurance as a massive 77.7mm soaking turned Grant Park into a total mud pit. It felt much stickier than the thermometer suggested, especially on Friday when the humidity made 27°C feel closer to 29°C. By Sunday, the clouds finally broke for a lovely, breezy finale that was significantly cooler than the usual late-July heat. If you packed sturdy waterproof boots and a poncho, you were the hero of the weekend, as those middle days were far soggier than the usual averages. Despite the damp socks and the Saturday washout, the cooler evening air made for some of the most comfortable dancing weather we have seen in years.

Updated Oct 29, 2026