Some lighter showers are expected to move in during the afternoon, with heavy rain and potential thunderstorms arriving by evening, Petr said.
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Chicago Tribune

Lollapalooza 2026 weather forecast: Mild temperatures with potential storms

Lollapalooza will see a weekend of mild temperatures, with showers and possible thunderstorms rolling in by Friday, forecasters said. Jake Petr, a meteorologist with the National Weather Service in Chicago, said Thursday will bring sunny conditions with highs in the mid-70s and light winds.

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