Chicago weather in July: Chicago, Illinois: normal highs, lows, rain and records for July
Chicago in July has a normal high of 85°F and a normal low of 66°F, a daily mean of 75°F, holding near 85°F all month. Measurable precipitation falls on 10 days in a normal July, 3.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 19°C, 94 mm of precipitation in July.
- NOAA stationChicago O'Hare International Airport
- Station IDUSW00094846
- Location41.99°N 87.93°W
- Elevation658 ft (201 m)
- From the center17 miles
- Population2,721,308
- Jan 32° 19°
- Feb 36° 22°
- Mar 47° 31°
- Apr 59° 40°
- May 71° 51°
- Jun 80° 61°
- Jul 85° 66°
- Aug 83° 65°
- Sep 76° 57°
- Oct 63° 45°
- Nov 48° 34°
- Dec 37° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chicago in July?
The normal high is 85°F and the normal low 66°F, for a daily mean of 75.4°F. July is 4.8°F warmer than June and 1.6°F warmer than August. July is the warmest month of the year in Chicago and the 5th wettest. From one year to the next July's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Julys in three average between 73°F and 78°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 84°F | 65°F | 33% | 20% |
| July 8 | 85°F | 66°F | 32% | 20% |
| July 15 | 85°F | 67°F | 32% | 19% |
| July 22 | 85°F | 67°F | 32% | 20% |
| July 31 | 84°F | 67°F | 32% | 20% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 11, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 84°F | 65°F | 33% | 20% | 15 h 10 min |
| July 2 | 84°F | 65°F | 33% | 20% | 15 h 10 min |
| July 3 | 84°F | 66°F | 32% | 20% | 15 h 10 min |
| July 4 | 84°F | 66°F | 32% | 20% | 15 h 10 min |
| July 5 | 84°F | 66°F | 32% | 20% | 15 h 10 min |
| July 6 | 85°F | 66°F | 32% | 20% | 15 h 10 min |
| July 7 | 85°F | 66°F | 32% | 20% | 15 h 10 min |
| July 8 | 85°F | 66°F | 32% | 20% | 15 h 10 min |
| July 9 | 85°F | 66°F | 32% | 20% | 15 h 10 min |
| July 10 | 85°F | 66°F | 32% | 20% | 15 h |
| July 11 | 85°F | 67°F | 32% | 20% | 15 h |
| July 12 | 85°F | 67°F | 32% | 19% | 15 h |
| July 13 | 85°F | 67°F | 32% | 19% | 15 h |
| July 14 | 85°F | 67°F | 32% | 19% | 15 h |
| July 15 | 85°F | 67°F | 32% | 19% | 15 h |
| July 16 | 85°F | 67°F | 32% | 19% | 15 h |
| July 17 | 85°F | 67°F | 32% | 19% | 15 h |
| July 18 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 19 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 20 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 21 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 22 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 23 | 85°F | 67°F | 32% | 20% | 14 h 50 min |
| July 24 | 85°F | 67°F | 32% | 20% | 14 h 40 min |
| July 25 | 84°F | 67°F | 32% | 20% | 14 h 40 min |
| July 26 | 84°F | 67°F | 32% | 20% | 14 h 40 min |
| July 27 | 84°F | 67°F | 32% | 20% | 14 h 40 min |
| July 28 | 84°F | 67°F | 32% | 20% | 14 h 40 min |
| July 29 | 84°F | 67°F | 32% | 20% | 14 h 30 min |
| July 30 | 84°F | 67°F | 32% | 20% | 14 h 30 min |
| July 31 | 84°F | 67°F | 32% | 20% | 14 h 30 min |
- Normal high
- 85°FJuly average
- Normal low
- 66°FJuly average
- Precipitation
- 3.71 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 15 h 10 min to 14 h 30 minJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 24
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094846; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chicago in July?
On a given July day the chance of 0.01 inch or more is 32% on average, highest around July 1 (33%). In all, 3.71 in falls on 10 days of a normal July, 1 of them with an inch or more.
In a normal July in Chicago, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094846.
How humid and windy is Chicago in July?
At 3 p.m. the normal temperature is 81°F with 50% relative humidity and a dew point of 61°F; at 6 a.m. it is 68°F with 81% humidity. The wind averages 7.8 mph, most often from the west-northwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 68°F | 63°F | 81% | 5.9 mph | 37% |
| 9 a.m. | 76°F | 62°F | 62% | 8.2 mph | 36% |
| noon | 81°F | 61°F | 52% | 9.8 mph | 17% |
| 3 p.m. | 81°F | 61°F | 50% | 10.9 mph | 19% |
| 6 p.m. | 78°F | 61°F | 56% | 10.0 mph | 23% |
| 9 p.m. | 73°F | 62°F | 70% | 6.5 mph | 46% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094846. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Chicago?
The warmest July temperature on Chicago's official record (since 1872) is 105°F, on July 24, 1934; the coldest is 45°F, on July 7, 1983. The wettest July brought 11.15 in (2011).
The July mean against the 1991-2020 normal of 75.4°F: 2021 74.4°F (−1.0), 2022 75.3°F (−0.1), 2023 75.7°F (+0.3), 2024 75.0°F (−0.4), 2025 77.5°F (+2.1), 2026 76.8°F (+1.4). 3 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.4°F | −1.0°F | 1.90 in |
| 2022 | 75.3°F | −0.1°F | 4.50 in |
| 2023 | 75.7°F | +0.3°F | 7.61 in |
| 2024 | 75.0°F | −0.4°F | 5.89 in |
| 2025 | 77.5°F | +2.1°F | 4.29 in |
| 2026 | 76.8°F | +1.4°F | 5.36 in |
Source: records: ACIS, NWS threaded record ORDthr; recent months: ACIS, station USW00094846. Records and recent months use complete months only.
How does July in Chicago compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, July normal highs run from 81°F in Barrington to 90°F in Belleville; Chicago's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.