Chicago Weather in October
17.2°C high · 6.3°C low · 70 mm rain · 4.5h sun
Oct is a warm month in Chicago — not peak season, but a good time to avoid crowds.
October at a glance
| Metric | Value |
|---|---|
| Average high | 17.2°C |
| Average low | 6.3°C |
| Rainfall | 70 mm |
| Sunshine | 4.5 hours/day |
| Daylight | 10.8 hours |
What to pack in October
Pack a jacket and layers for Chicago in October.
Chicago weather by month
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Frequently asked questions
What is the weather in Chicago in October?
Highs of 17.2°C and lows of 6.3°C, with about 70 mm of rain and 4.5 hours of sunshine per day.
Is October a good time to visit Chicago?
Oct is a warm month in Chicago — not peak season, but a good time to avoid crowds.
What to do in Chicago · Best time to visit Chicago
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.