West Chicago weather in December: West Chicago, Illinois: normal highs, lows, rain and records for December
West Chicago in December has a normal high of 35°F and a normal low of 21°F, a daily mean of 28°F, falling from 41°F on the 1st to 32°F by the 31st. Measurable precipitation falls on 9 days in a normal December, 1.67 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 42 mm of precipitation in December.
- 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 December?
The normal high is 35°F and the normal low 21°F, for a daily mean of 28.4°F. December is 11.0°F cooler than November and 5.1°F warmer than January. December is the 10th warmest month of the year in West Chicago and the 10th wettest. Across the month the normal high falls 9°F, from 41°F on December 1 to 32°F on December 31. From one year to the next December's mean temperature typically moves about 5.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 23°F and 33°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 41°F | 26°F | 29% | 14% |
| December 8 | 38°F | 23°F | 29% | 14% |
| December 15 | 35°F | 22°F | 28% | 13% |
| December 22 | 33°F | 20°F | 28% | 12% |
| December 31 | 32°F | 18°F | 27% | 12% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 41°F | 26°F | 29% | 14% | 9 h 20 min |
| December 2 | 40°F | 25°F | 29% | 14% | 9 h 20 min |
| December 3 | 40°F | 25°F | 29% | 14% | 9 h 20 min |
| December 4 | 39°F | 25°F | 29% | 14% | 9 h 20 min |
| December 5 | 39°F | 24°F | 29% | 14% | 9 h 20 min |
| December 6 | 39°F | 24°F | 29% | 14% | 9 h 20 min |
| December 7 | 38°F | 24°F | 29% | 14% | 9 h 20 min |
| December 8 | 38°F | 23°F | 29% | 14% | 9 h 10 min |
| December 9 | 37°F | 23°F | 29% | 13% | 9 h 10 min |
| December 10 | 37°F | 23°F | 29% | 13% | 9 h 10 min |
| December 11 | 37°F | 23°F | 29% | 13% | 9 h 10 min |
| December 12 | 36°F | 22°F | 29% | 13% | 9 h 10 min |
| December 13 | 36°F | 22°F | 28% | 13% | 9 h 10 min |
| December 14 | 36°F | 22°F | 28% | 13% | 9 h 10 min |
| December 15 | 35°F | 22°F | 28% | 13% | 9 h 10 min |
| December 16 | 35°F | 21°F | 28% | 13% | 9 h 10 min |
| December 17 | 35°F | 21°F | 28% | 13% | 9 h 10 min |
| December 18 | 35°F | 21°F | 28% | 13% | 9 h 10 min |
| December 19 | 34°F | 21°F | 28% | 13% | 9 h 10 min |
| December 20 | 34°F | 20°F | 28% | 13% | 9 h 10 min |
| December 21 | 34°F | 20°F | 28% | 13% | 9 h 10 min |
| December 22 | 33°F | 20°F | 28% | 12% | 9 h 10 min |
| December 23 | 33°F | 20°F | 28% | 12% | 9 h 10 min |
| December 24 | 33°F | 19°F | 28% | 12% | 9 h 10 min |
| December 25 | 33°F | 19°F | 28% | 12% | 9 h 10 min |
| December 26 | 33°F | 19°F | 27% | 12% | 9 h 10 min |
| December 27 | 32°F | 19°F | 27% | 12% | 9 h 10 min |
| December 28 | 32°F | 19°F | 27% | 12% | 9 h 10 min |
| December 29 | 32°F | 18°F | 27% | 12% | 9 h 10 min |
| December 30 | 32°F | 18°F | 27% | 12% | 9 h 10 min |
| December 31 | 32°F | 18°F | 27% | 12% | 9 h 10 min |
- Normal high
- 35°FDecember average
- Normal low
- 21°FDecember average
- Precipitation
- 1.67 inmonth total
- Days with precipitation
- 90.01 inch or more
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 20 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 61%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 December?
On a given December day the chance of 0.01 inch or more is 28% on average, highest around December 1 (29%). In all, 1.67 in falls on 9 days of a normal December.
In a normal December in West Chicago, 27 nights fall to freezing and 11 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094892.
How humid and windy is West Chicago in December?
At 3 p.m. the normal temperature is 30°F with 69% relative humidity and a dew point of 21°F; at 6 a.m. it is 23°F with 82% humidity. The wind averages 10.6 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 23°F | 18°F | 82% | 9.6 mph | – |
| 9 a.m. | 24°F | 19°F | 80% | 10.4 mph | – |
| noon | 29°F | 20°F | 71% | 12.5 mph | – |
| 3 p.m. | 30°F | 21°F | 69% | 12.1 mph | – |
| 6 p.m. | 27°F | 21°F | 77% | 10.5 mph | – |
| 9 p.m. | 25°F | 20°F | 79% | 10.2 mph | 52% |
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 December in West Chicago?
The warmest December temperature on this station's record (since 1997) is 69°F, on December 3, 2012; the coldest is −15°F, on December 19, 2016. The wettest December brought 5.10 in (2015).
The December mean against the 1991-2020 normal of 28.4°F: 2021 35.6°F (+7.2), 2022 27.6°F (−0.8), 2023 37.2°F (+8.8), 2025 24.8°F (−3.6). 2 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 35.6°F | +7.2°F | 1.69 in |
| 2022 | 27.6°F | −0.8°F | 1.91 in |
| 2023 | 37.2°F | +8.8°F | 2.26 in |
| 2025 | 24.8°F | −3.6°F | 1.41 in |
Source: records: ACIS, station USW00094892; recent months: ACIS, station USW00094892. Records and recent months use complete months only.
How does December in West Chicago compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, December normal highs run from 33°F in Galena to 48°F in Anna; West Chicago's is 35°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Chicago in November48°F by day, 31°F at night
- West Chicago in January31°F by day, 16°F at night
- West Chicago through the yearEvery month, frost dates, records and recent years
- Illinois in DecemberThe statewide normal and the warmest and coolest places
- Anna: Illinois's warmest Decembernormal high 48°F