🇺🇸 Chicago, Illinois, USA
Does It Rain at Lollapalooza Chicago?
Across roughly 15 years of records at the site, rain falls on about 100% of Lollapalooza days, averaging 2.0mm a day.
The short answer
100%
of days see 1mm+
2.0 mm
average per day
High
wet-ground risk
Wet days are common enough that waterproof shoes and a real rain jacket are a sensible default rather than an over-reaction.
Rain day by day
| Day | Rain | High | Weather score |
|---|---|---|---|
| Thu 30 Jul | 1.1 mm | 25°C | 97% |
| Fri 31 Jul | 1.7 mm | 26°C | 96% |
| Sat 1 Aug | 1.5 mm | 27°C | 96% |
| Sun 2 Aug | 3.8 mm | 28°C | 89% |
The wettest festival day on average is Sun 2 Aug at 3.8mm; the driest is Thu 30 Jul at 1.1mm. Over the main days that adds up to roughly 8.1mm.
What rain actually does to Lollapalooza
Heat and humidity are exhausting in a downtown park with limited shade — water stations and the lakefront breeze are heavily used. Severe storms are the real disruptor: Lollapalooza has been briefly evacuated multiple times when lightning approached the city, and organisers monitor radar all weekend.
If the forecast turns wet
- Waterproof shoes over trainers — you'll be on wet pavement and grass all day.
- Rain jacket for walking, poncho for standing in a crowd with a backpack.
- No campsite here, so the fix for a bad hour is indoors, under cover, or an early trip home and back.
- A dry bag for phone, power bank and tickets, and dry clothes waiting at home.
How we know
These numbers come from the Open-Meteo historical reanalysis at the festival's coordinates, averaged day by day over about 15 years. They describe a typical edition, not the one you're going to — for the live picture, the Lollapalooza forecast page updates twice a day once the event is inside the forecast window.