Chicago weather in October
Chicago in October averages 13°C (55°F) and 98 mm of rain.
Of the twelve months in Chicago, October is the sixth warmest and the sixth wettest.
- Average temp
- 13°C (55°F)
8–17°C · 46–63°F
- Rainfall
- 98 mm
Showers likely
- Sunshine
- —
- Wind
- 16 km/h
What is Chicago like in October?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Chicago in October?
A light rain jacket
About 98 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 8°C (46°F).
October compared with September and November
October in Chicago is 6.9°C cooler than September and 13 mm wetter than it, which averages 20°C (67°F).
October in Chicago is 7.2°C warmer than November and 29 mm wetter than it, which averages 6°C (42°F).
Daylight in Chicago in October
On 15 October the sun is up for 11 hours 5 minutes in Chicago, rising about 07:03 and setting about 18:08 local time.
October ends 1 hour 20 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 4 hours 8 minutes short of June, the longest-lit month here.
Where to stay in Chicago
Dates are a starting point for October.
Travel guides for Chicago
What to read before you book.
Chicago weather by month
TemperatureRainfall
How October compares with the rest of the year
October is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | -3°C / 26°F | 58 mm |
| February | -1°C / 29°F | 54 mm |
| March | 4°C / 39°F | 68 mm |
| April | 10°C / 50°F | 105 mm |
| May | 16°C / 62°F | 121 mm |
| June | 22°C / 72°F | 115 mm |
| July | 25°C / 76°F | 102 mm |
| August | 24°C / 74°F | 104 mm |
| September | 20°C / 67°F | 85 mm |
| October | 13°C / 55°F | 98 mm |
| November | 6°C / 42°F | 69 mm |
| December | 0°C / 31°F | 59 mm |
Similar weather in October
Other destinations whose October averages sit close to this one.
Check another month
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FAQs about Chicago in October
October climate averages for Chicago, 1991–2020.
Chicago averages 13°C (55°F) in October, ranging from about 8°C (46°F) at night to 17°C (63°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 98 mm falls across October, enough to need a light jacket but not enough to reshape a trip.
Yes. October averages 13°C (55°F) against 6°C (42°F) in November — 7.2°C warmer.
October is 6.9°C cooler than September, and 13 mm wetter.
Yes. October falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what October is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 11 hours 5 minutes of daylight in mid-October, against 15 hours 13 minutes in June and 9 hours 9 minutes in December.
On 15 October, sunrise is about 07:03 and sunset about 18:08 local time. Both shift across the month — the month ends 1 hour 20 minutes shorter than it starts.
