West Chicago weather in July: West Chicago, Illinois: normal highs, lows, rain and records for July
West Chicago in July has a normal high of 84°F and a normal low of 63°F, a daily mean of 74°F, holding near 84°F all month. Measurable precipitation falls on 10 days in a normal July, 3.62 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 17°C, 92 mm of precipitation in July.
- NOAA stationWest Chicago Dupage Airport
- Station IDUSW00094892
- Location41.91°N 88.25°W
- Elevation754 ft (230 m)
- From the center2 miles
- Population25,469
- Jan 31° 16°
- Feb 35° 19°
- Mar 47° 28°
- Apr 60° 38°
- May 71° 49°
- Jun 81° 59°
- Jul 84° 63°
- Aug 82° 62°
- Sep 76° 54°
- Oct 62° 42°
- Nov 48° 31°
- Dec 35° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Chicago in July?
The normal high is 84°F and the normal low 63°F, for a daily mean of 73.7°F. July is 4.0°F warmer than June and 1.8°F warmer than August. July is the warmest month of the year in West Chicago and the 4th wettest. From one year to the next July's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Julys in three average between 71°F and 76°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 84°F | 62°F | 34% | 21% |
| July 8 | 84°F | 63°F | 34% | 20% |
| July 15 | 84°F | 64°F | 33% | 20% |
| July 22 | 84°F | 64°F | 34% | 20% |
| July 31 | 84°F | 63°F | 35% | 19% |
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 | 62°F | 34% | 21% | 15 h 10 min |
| July 2 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 3 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 4 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 5 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 6 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 7 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 8 | 84°F | 63°F | 34% | 20% | 15 h 10 min |
| July 9 | 84°F | 63°F | 33% | 20% | 15 h |
| July 10 | 84°F | 63°F | 33% | 20% | 15 h |
| July 11 | 84°F | 63°F | 33% | 20% | 15 h |
| July 12 | 84°F | 63°F | 33% | 20% | 15 h |
| July 13 | 84°F | 63°F | 33% | 20% | 15 h |
| July 14 | 84°F | 64°F | 33% | 20% | 15 h |
| July 15 | 84°F | 64°F | 33% | 20% | 15 h |
| July 16 | 84°F | 64°F | 33% | 20% | 15 h |
| July 17 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 18 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 19 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 20 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 21 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 22 | 84°F | 64°F | 34% | 20% | 14 h 50 min |
| July 23 | 84°F | 64°F | 34% | 20% | 14 h 40 min |
| July 24 | 84°F | 64°F | 34% | 20% | 14 h 40 min |
| July 25 | 84°F | 64°F | 34% | 20% | 14 h 40 min |
| July 26 | 84°F | 64°F | 34% | 20% | 14 h 40 min |
| July 27 | 84°F | 64°F | 34% | 20% | 14 h 40 min |
| July 28 | 84°F | 63°F | 35% | 20% | 14 h 40 min |
| July 29 | 84°F | 63°F | 35% | 20% | 14 h 30 min |
| July 30 | 84°F | 63°F | 35% | 19% | 14 h 30 min |
| July 31 | 84°F | 63°F | 35% | 19% | 14 h 30 min |
- Normal high
- 84°FJuly average
- Normal low
- 63°FJuly average
- Precipitation
- 3.62 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 6
- 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
- 25
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094892; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Chicago in July?
On a given July day the chance of 0.01 inch or more is 34% on average, highest around July 31 (35%). In all, 3.62 in falls on 10 days of a normal July, 1 of them with an inch or more.
In a normal July in West Chicago, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094892.
How humid and windy is West Chicago in July?
At 3 p.m. the normal temperature is 81°F with 53% relative humidity and a dew point of 62°F; at 6 a.m. it is 66°F with 87% humidity. The wind averages 7.0 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 66°F | 62°F | 87% | 5.0 mph | 76% |
| 9 a.m. | 75°F | 64°F | 67% | 8.0 mph | 71% |
| noon | 80°F | 63°F | 55% | 9.5 mph | 62% |
| 3 p.m. | 81°F | 62°F | 53% | 10.2 mph | 63% |
| 6 p.m. | 78°F | 63°F | 59% | 9.0 mph | 76% |
| 9 p.m. | 71°F | 63°F | 76% | 5.5 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094892. 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 West Chicago?
The warmest July temperature on this station's record (since 1997) is 100°F, on July 24, 2005; the coldest is 42°F, on July 2, 2001. The wettest July brought 9.62 in (2023).
The July mean against the 1991-2020 normal of 73.7°F: 2021 73.2°F (−0.5), 2022 73.9°F (+0.2), 2023 73.3°F (−0.4), 2024 73.1°F (−0.6), 2025 76.5°F (+2.8), 2026 74.5°F (+0.8). 3 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 73.2°F | −0.5°F | 2.49 in |
| 2022 | 73.9°F | +0.2°F | 4.16 in |
| 2023 | 73.3°F | −0.4°F | 9.62 in |
| 2024 | 73.1°F | −0.6°F | 4.56 in |
| 2025 | 76.5°F | +2.8°F | 6.96 in |
| 2026 | 74.5°F | +0.8°F | 5.41 in |
Source: records: ACIS, station USW00094892; recent months: ACIS, station USW00094892. Records and recent months use complete months only.
How does July in West 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; West Chicago's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.