Chicago · Month comparison

July vs October

October ranks #1 overall vs July at #10. Chicago Marathon weekend (second Sun in Oct) — 50,000 runners through every neighbourhood.

Lollapalooza crowd in Grant Park Chicago

July

#10 of 12 months

Strong option

Lollapalooza, Taste of Chicago, 4 July fireworks at Navy Pier — the city at maximum volume.

  • ↑Lollapalooza in Grant Park (late July) — 400,000 attendees
  • ↑Taste of Chicago — every signature dish from every signature kitchen
Chicago Marathon runners through downtown

October

#1 of 12 months

Best match

Chicago Marathon weekend (second Sun in Oct) — 50,000 runners through every neighbourhood.

  • ↑Chicago Marathon — World Marathon Majors event, the entire city stops to watch
  • ↑Lincoln Park and the lakefront in red-and-gold maple
FactorJulyOctober
Weather score
8
9
Value score
2
7
Crowd score
2
7
Events score
10
9
Atmosphere
10
10
Avg high temp29°C17°C
Monthly rain95mm80mm
Daily sunshine11hrs7hrs

July trade-offs

  • ↓29°C plus humidity feels like 35°C+; heat-index advisories common
  • ↓Hotel rates peak — Loop hotels $300+, Streeterville $400+
  • ↓Lakefront Trail packed; bike-rental queues at every dock

October trade-offs

  • ↓Marathon weekend hotel rates double; Loop streets closed
  • ↓First frost and possible early snow late month
See all 12 months for Chicago →July in detail →October in detail →
Scores compare months within Chicago. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →