Cook County Weather in July
Average highs run from 66°F on July 1 to 71°F on July 31, and lows from 48°F to 55°F. Normal precipitation for the month is 3.39 in over about 10 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 69°F
- Average low
- 52°F
- Precipitation
- 3.39 in
- Record high
- 95°FJul 5, 2021
- Record low
- 41°FJul 1, 2001
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.6
- Daylight
- 15 h 56 min to 15 h 00 min
- Cloud cover
- 59%
- Humidity
- 74%
- Dew point
- 55°F
- Wind
- 6.5 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 |
|---|---|---|---|---|---|---|
| Jul 1 | 66°F | 48°F | 85°F 2006 | 41°F 2001 | 35% | 0% |
| Jul 2 | 66°F | 48°F | 87°F 2006 | 42°F 2022 | 35% | 0% |
| Jul 3 | 66°F | 49°F | 85°F 2021 | 41°F 2022 | 35% | 0% |
| Jul 4 | 67°F | 49°F | 89°F 2007 | 42°F 2014 | 35% | 0% |
| Jul 5 | 67°F | 49°F | 95°F 2021 | 43°F 2001 | 35% | 0% |
| Jul 6 | 67°F | 49°F | 80°F 2008 | 41°F 2005 | 35% | 0% |
| Jul 7 | 68°F | 50°F | 84°F 2014 | 42°F 2014 | 35% | 0% |
| Jul 8 | 68°F | 50°F | 79°F 2006 | 42°F 2003 | 34% | 0% |
| Jul 9 | 68°F | 50°F | 91°F 2001 | 42°F 2014 | 34% | 0% |
| Jul 10 | 68°F | 50°F | 84°F 2020 | 42°F 2014 | 34% | 0% |
| Jul 11 | 69°F | 51°F | 82°F 2020 | 42°F 2022 | 34% | 0% |
| Jul 12 | 69°F | 51°F | 84°F 2019 | 42°F 2014 | 34% | 0% |
| Jul 13 | 69°F | 51°F | 87°F 2000 | 44°F 2022 | 33% | 0% |
| Jul 14 | 69°F | 52°F | 91°F 2024 | 42°F 2014 | 33% | 0% |
| Jul 15 | 69°F | 52°F | 94°F 2006 | 44°F 2014 | 33% | 0% |
| Jul 16 | 70°F | 52°F | 85°F 2010 | 43°F 2003 | 33% | 0% |
| Jul 17 | 70°F | 52°F | 84°F 2006 | 42°F 2014 | 33% | 0% |
| Jul 18 | 70°F | 52°F | 80°F 2011 | 45°F 2000 | 32% | 0% |
| Jul 19 | 70°F | 53°F | 85°F 2021 | 43°F 2026 | 32% | 0% |
| Jul 20 | 70°F | 53°F | 87°F 2006 | 45°F 2020 | 32% | 0% |
| Jul 21 | 70°F | 53°F | 91°F 2016 | 45°F 2013 | 31% | 0% |
| Jul 22 | 71°F | 53°F | 92°F 2016 | 43°F 2026 | 31% | 0% |
| Jul 23 | 71°F | 54°F | 86°F 2001 | 43°F 2026 | 31% | 0% |
| Jul 24 | 71°F | 54°F | 93°F 2005 | 43°F 2026 | 31% | 0% |
| Jul 25 | 71°F | 54°F | 91°F 2021 | 43°F 2022 | 31% | 0% |
| Jul 26 | 71°F | 54°F | 85°F 2014 | 44°F 2022 | 30% | 0% |
| Jul 27 | 71°F | 54°F | 87°F 2007 | 45°F 2022 | 30% | 0% |
| Jul 28 | 71°F | 54°F | 89°F 2006 | 46°F 2022 | 30% | 0% |
| Jul 29 | 71°F | 54°F | 91°F 1999 | 47°F 2013 | 30% | 0% |
| Jul 30 | 71°F | 54°F | 91°F 1999 | 44°F 2022 | 30% | 0% |
| Jul 31 | 71°F | 55°F | 87°F 2006 | 47°F 2019 | 29% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- July 1
- sunrise 5:08 AM, sunset 9:04 PM
- July 31
- sunrise 5:38 AM, sunset 8:38 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.