Cook County Weather in October
Average highs run from 56°F on October 1 to 43°F on October 31, and lows from 42°F to 31°F. Normal precipitation for the month is 3.04 in over about 9 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 50°F
- Average low
- 36°F
- Precipitation
- 3.04 in
- Snowfall
- 0.1 in
- Record high
- 74°FOct 3, 2023
- Record low
- 20°FOct 30, 2020
- Chance of a freeze
- 99%
- Daylight
- 11 h 40 min to 10 h 00 min
- Cloud cover
- 72%
- Humidity
- 80%
- Dew point
- 35°F
- Wind
- 8.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Oct 1 | 56°F | 42°F | 73°F 2013 | 28°F 2003 | 32% | 0% |
| Oct 2 | 56°F | 42°F | 70°F 2005 | 27°F 1999 | 32% | 0% |
| Oct 3 | 55°F | 41°F | 74°F 2023 | 27°F 1999 | 32% | 0% |
| Oct 4 | 55°F | 41°F | 69°F 2025 | 29°F 2000 | 32% | 0% |
| Oct 5 | 55°F | 41°F | 72°F 2025 | 27°F 1999 | 32% | 0% |
| Oct 6 | 54°F | 40°F | 69°F 2010 | 26°F 1999 | 32% | 0% |
| Oct 7 | 54°F | 40°F | 69°F 2011 | 29°F 2002 | 32% | 0% |
| Oct 8 | 53°F | 39°F | 71°F 2011 | 31°F 2000 | 32% | 0% |
| Oct 9 | 53°F | 39°F | 67°F 2020 | 29°F 2000 | 31% | 0% |
| Oct 10 | 52°F | 39°F | 65°F 2021 | 30°F 2006 | 31% | 0% |
| Oct 11 | 52°F | 38°F | 70°F 2024 | 29°F 2012 | 31% | 0% |
| Oct 12 | 52°F | 38°F | 68°F 2021 | 26°F 2006 | 31% | 0% |
| Oct 13 | 51°F | 38°F | 65°F 2008 | 25°F 2018 | 31% | 0% |
| Oct 14 | 51°F | 37°F | 66°F 2005 | 26°F 2002 | 31% | 1% |
| Oct 15 | 50°F | 37°F | 59°F 2015 | 25°F 2002 | 30% | 1% |
| Oct 16 | 50°F | 36°F | 65°F 2010 | 24°F 2002 | 30% | 1% |
| Oct 17 | 49°F | 36°F | 66°F 2021 | 23°F 2015 | 30% | 1% |
| Oct 18 | 49°F | 36°F | 67°F 2017 | 27°F 2015 | 30% | 1% |
| Oct 19 | 48°F | 35°F | 62°F 2018 | 26°F 2022 | 30% | 1% |
| Oct 20 | 48°F | 35°F | 67°F 2000 | 27°F 2020 | 29% | 1% |
| Oct 21 | 48°F | 35°F | 67°F 2022 | 28°F 2001 | 29% | 1% |
| Oct 22 | 47°F | 34°F | 59°F 2017 | 29°F 2018 | 29% | 1% |
| Oct 23 | 47°F | 34°F | 62°F 2022 | 25°F 2006 | 29% | 2% |
| Oct 24 | 46°F | 33°F | 61°F 2022 | 25°F 2006 | 29% | 2% |
| Oct 25 | 46°F | 33°F | 62°F 1999 | 27°F 2020 | 28% | 2% |
| Oct 26 | 45°F | 33°F | 57°F 2000 | 25°F 2003 | 28% | 2% |
| Oct 27 | 45°F | 32°F | 65°F 1998 | 23°F 2020 | 28% | 2% |
| Oct 28 | 44°F | 32°F | 59°F 2024 | 26°F 2012 | 28% | 2% |
| Oct 29 | 44°F | 32°F | 59°F 2021 | 24°F 2020 | 27% | 3% |
| Oct 30 | 44°F | 31°F | 56°F 2005 | 20°F 2020 | 27% | 3% |
| Oct 31 | 43°F | 31°F | 53°F 2000 | 21°F 2023 | 27% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- October 1
- sunrise 7:01 AM, sunset 6:41 PM
- October 31
- sunrise 7:45 AM, sunset 5:45 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00213282 (Grand Marais), public domain. Records: NOAA GHCN-Daily, station USW00094992, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.