West Chicago weather in October: West Chicago, Illinois: normal highs, lows, rain and records for October
West Chicago in October has a normal high of 62°F and a normal low of 42°F, a daily mean of 52°F, falling from 70°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 11 days in a normal October, 2.99 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 6°C, 76 mm of precipitation in October.
- 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 October?
The normal high is 62°F and the normal low 42°F, for a daily mean of 52.2°F. October is 12.4°F cooler than September and 12.8°F warmer than November. October is the 6th warmest month of the year in West Chicago and the 7th wettest. Across the month the normal high falls 15°F, from 70°F on October 1 to 55°F on October 31. From one year to the next October's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 50°F and 55°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 |
|---|---|---|---|---|
| October 1 | 70°F | 48°F | 35% | 20% |
| October 8 | 66°F | 45°F | 34% | 20% |
| October 15 | 63°F | 42°F | 34% | 20% |
| October 22 | 60°F | 40°F | 33% | 19% |
| October 31 | 55°F | 37°F | 31% | 17% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 70°F | 48°F | 35% | 20% | 11 h 50 min |
| October 2 | 69°F | 47°F | 35% | 20% | 11 h 50 min |
| October 3 | 69°F | 47°F | 35% | 20% | 11 h 40 min |
| October 4 | 68°F | 46°F | 35% | 20% | 11 h 40 min |
| October 5 | 68°F | 46°F | 35% | 20% | 11 h 40 min |
| October 6 | 67°F | 46°F | 34% | 20% | 11 h 30 min |
| October 7 | 67°F | 45°F | 34% | 20% | 11 h 30 min |
| October 8 | 66°F | 45°F | 34% | 20% | 11 h 30 min |
| October 9 | 66°F | 44°F | 34% | 20% | 11 h 30 min |
| October 10 | 65°F | 44°F | 34% | 20% | 11 h 20 min |
| October 11 | 65°F | 44°F | 34% | 20% | 11 h 20 min |
| October 12 | 64°F | 43°F | 34% | 20% | 11 h 20 min |
| October 13 | 64°F | 43°F | 34% | 20% | 11 h 20 min |
| October 14 | 63°F | 43°F | 34% | 20% | 11 h 10 min |
| October 15 | 63°F | 42°F | 34% | 20% | 11 h 10 min |
| October 16 | 62°F | 42°F | 34% | 19% | 11 h 10 min |
| October 17 | 62°F | 42°F | 34% | 19% | 11 h |
| October 18 | 62°F | 41°F | 33% | 19% | 11 h |
| October 19 | 61°F | 41°F | 33% | 19% | 11 h |
| October 20 | 61°F | 41°F | 33% | 19% | 11 h |
| October 21 | 60°F | 40°F | 33% | 19% | 10 h 50 min |
| October 22 | 60°F | 40°F | 33% | 19% | 10 h 50 min |
| October 23 | 59°F | 40°F | 33% | 19% | 10 h 50 min |
| October 24 | 59°F | 39°F | 32% | 18% | 10 h 50 min |
| October 25 | 58°F | 39°F | 32% | 18% | 10 h 40 min |
| October 26 | 58°F | 39°F | 32% | 18% | 10 h 40 min |
| October 27 | 57°F | 38°F | 32% | 18% | 10 h 40 min |
| October 28 | 57°F | 38°F | 31% | 17% | 10 h 30 min |
| October 29 | 56°F | 37°F | 31% | 17% | 10 h 30 min |
| October 30 | 56°F | 37°F | 31% | 17% | 10 h 30 min |
| October 31 | 55°F | 37°F | 31% | 17% | 10 h 30 min |
- Normal high
- 62°FOctober average
- Normal low
- 42°FOctober average
- Precipitation
- 2.99 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 5
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 8
- Days at 80°F or more
- 2
- Sunshine
- 71%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 October?
On a given October day the chance of 0.01 inch or more is 33% on average, highest around October 1 (35%). In all, 2.99 in falls on 11 days of a normal October, 1 of them with an inch or more.
In a normal October in West Chicago, 5 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094892.
How humid and windy is West Chicago in October?
At 3 p.m. the normal temperature is 53°F with 55% relative humidity and a dew point of 37°F; at 6 a.m. it is 41°F with 82% humidity. The wind averages 10.0 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 41°F | 35°F | 82% | 8.6 mph | 57% |
| 9 a.m. | 46°F | 38°F | 72% | 11.3 mph | 56% |
| noon | 52°F | 38°F | 58% | 12.7 mph | 53% |
| 3 p.m. | 53°F | 37°F | 55% | 12.6 mph | 53% |
| 6 p.m. | 47°F | 37°F | 67% | 9.1 mph | – |
| 9 p.m. | 44°F | 36°F | 74% | 8.8 mph | – |
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 October in West Chicago?
The warmest October temperature on this station's record (since 1997) is 89°F, on October 4, 2025; the coldest is 21°F, on October 28, 1997. The wettest October brought 8.29 in (2017).
The October mean against the 1991-2020 normal of 52.2°F: 2021 58.0°F (+5.8), 2022 51.5°F (−0.7), 2023 53.4°F (+1.2), 2024 56.8°F (+4.6), 2025 56.9°F (+4.7). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.0°F | +5.8°F | 5.68 in |
| 2022 | 51.5°F | −0.7°F | 1.80 in |
| 2023 | 53.4°F | +1.2°F | 2.65 in |
| 2024 | 56.8°F | +4.6°F | 1.02 in |
| 2025 | 56.9°F | +4.7°F | 3.07 in |
Source: records: ACIS, station USW00094892; recent months: ACIS, station USW00094892. Records and recent months use complete months only.
How does October in West Chicago compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, October normal highs run from 60°F in Barrington to 73°F in Anna; West Chicago's is 62°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Chicago in September76°F by day, 54°F at night
- West Chicago in November48°F by day, 31°F at night
- West Chicago through the yearEvery month, frost dates, records and recent years
- Illinois in OctoberThe statewide normal and the warmest and coolest places
- Anna: Illinois's warmest Octobernormal high 73°F