🇺🇸 Chicago, Illinois, USA
Is It Cold at Night at Lollapalooza Chicago?
Evening lows average 20°C across the main days, based on roughly 15 years of records at the site.
The short answer
Not really — Lollapalooza nights stay mild, averaging 20°C, with the coolest festival night near 19°C (Fri 31 Jul). A light layer is usually enough after dark.
Lollapalooza has no campsite — you head home, to a hotel or to an apartment each night — so the overnight low matters for the last few hours on site and the journey back, not for how you sleep.
You won't need much after dark — a T-shirt and a light overshirt is plenty for the walk or ride home.
Night by night
| Night of | Low | High that day | Rain |
|---|---|---|---|
| Thu 30 Jul | 19°C | 25°C | 1.1 mm |
| Fri 31 Jul | 19°C | 26°C | 1.7 mm |
| Sat 1 Aug | 20°C | 27°C | 1.5 mm |
| Sun 2 Aug | 20°C | 28°C | 3.8 mm |
Long-run averages, not a forecast. Individual years swing several degrees either side.
Staying warm for the last set and the way home
- Carry one layer all day. You'll leave in the coldest hour of the night, hours after you arrived in the sun.
- Windproof beats thick. A thin shell stops the evening breeze that actually makes you cold.
- Standing still is the problem. Late sets feel far colder than the walk between stages — dress for the standing.
- Plan the trip home. Waiting for transport soaked in sweat at 20°C is the bit people regret.
Why nights matter to the weather score
Our festival weather score treats overnight lows separately from daytime highs, because a warm afternoon doesn't make up for a cold, uncomfortable evening. Nights between roughly 10 and 24°C count as comfortable festival weather; below that the score starts to drop, and it drops sharply once lows fall under about 8°C.