Aurora weather in December: Aurora, Illinois: normal highs, lows, rain and records for December
Aurora in December has a normal high of 36°F and a normal low of 22°F, a daily mean of 29°F, falling from 41°F on the 1st to 32°F by the 31st. Measurable precipitation falls on 9 days in a normal December, 2.19 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 56 mm of precipitation and 16 cm of snow in December.
- NOAA stationAurora
- Station IDUSC00110338
- Location41.78°N 88.31°W
- Elevation660 ft (201 m)
- From the center2 miles
- Population180,710
- Jan 31° 16°
- Feb 35° 20°
- Mar 47° 29°
- Apr 60° 39°
- May 71° 50°
- Jun 81° 60°
- Jul 84° 65°
- Aug 82° 63°
- Sep 76° 55°
- Oct 63° 43°
- Nov 48° 32°
- Dec 36° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Aurora in December?
The normal high is 36°F and the normal low 22°F, for a daily mean of 28.7°F. December is 11.0°F cooler than November and 5.5°F warmer than January. December is the 10th warmest month of the year in Aurora 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 24°F and 34°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 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 41°F | 26°F | 31% | 17% |
| December 8 | 38°F | 24°F | 31% | 17% |
| December 15 | 36°F | 22°F | 30% | 16% |
| December 22 | 34°F | 20°F | 30% | 16% |
| December 31 | 32°F | 18°F | 29% | 16% |
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 | 31% | 17% | 9 h 20 min |
| December 2 | 40°F | 26°F | 31% | 17% | 9 h 20 min |
| December 3 | 40°F | 26°F | 31% | 17% | 9 h 20 min |
| December 4 | 39°F | 25°F | 31% | 17% | 9 h 20 min |
| December 5 | 39°F | 25°F | 31% | 17% | 9 h 20 min |
| December 6 | 39°F | 25°F | 31% | 17% | 9 h 20 min |
| December 7 | 38°F | 24°F | 31% | 17% | 9 h 20 min |
| December 8 | 38°F | 24°F | 31% | 17% | 9 h 20 min |
| December 9 | 38°F | 24°F | 31% | 17% | 9 h 10 min |
| December 10 | 37°F | 23°F | 31% | 16% | 9 h 10 min |
| December 11 | 37°F | 23°F | 31% | 16% | 9 h 10 min |
| December 12 | 37°F | 23°F | 30% | 16% | 9 h 10 min |
| December 13 | 36°F | 23°F | 30% | 16% | 9 h 10 min |
| December 14 | 36°F | 22°F | 30% | 16% | 9 h 10 min |
| December 15 | 36°F | 22°F | 30% | 16% | 9 h 10 min |
| December 16 | 35°F | 22°F | 30% | 16% | 9 h 10 min |
| December 17 | 35°F | 21°F | 30% | 16% | 9 h 10 min |
| December 18 | 35°F | 21°F | 30% | 16% | 9 h 10 min |
| December 19 | 35°F | 21°F | 30% | 16% | 9 h 10 min |
| December 20 | 34°F | 21°F | 30% | 16% | 9 h 10 min |
| December 21 | 34°F | 20°F | 30% | 16% | 9 h 10 min |
| December 22 | 34°F | 20°F | 30% | 16% | 9 h 10 min |
| December 23 | 34°F | 20°F | 29% | 16% | 9 h 10 min |
| December 24 | 33°F | 20°F | 29% | 16% | 9 h 10 min |
| December 25 | 33°F | 19°F | 29% | 16% | 9 h 10 min |
| December 26 | 33°F | 19°F | 29% | 16% | 9 h 10 min |
| December 27 | 33°F | 19°F | 29% | 16% | 9 h 10 min |
| December 28 | 32°F | 19°F | 29% | 16% | 9 h 10 min |
| December 29 | 32°F | 19°F | 29% | 16% | 9 h 10 min |
| December 30 | 32°F | 18°F | 29% | 16% | 9 h 10 min |
| December 31 | 32°F | 18°F | 29% | 16% | 9 h 10 min |
- Normal high
- 36°FDecember average
- Normal low
- 22°FDecember average
- Precipitation
- 2.19 inmonth total
- Days with precipitation
- 90.01 inch or more
- Snowfall
- 6.4 inmonth total
- 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 USC00110338; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Aurora in December?
On a given December day the chance of 0.01 inch or more is 30% on average, highest around December 3 (31%). In all, 2.19 in falls on 9 days of a normal December, 1 of them with an inch or more.
In a normal December in Aurora, 27 nights fall to freezing, 11 days stay below freezing all day and snowfall averages 6.4 inches.
Snow falls on 4 days in a normal December, and an inch or more covers the ground on 10 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00110338.
What are the records for December in Aurora?
The warmest December temperature on this station's record (since 1887) is 70°F, on December 4, 2012; the coldest is −25°F, on December 26, 1914. The wettest December brought 6.30 in (1949); the snowiest, 36.4 inches (1951).
The December mean against the 1991-2020 normal of 28.7°F: 2021 35.8°F (+7.1), 2022 25.6°F (−3.1), 2023 38.2°F (+9.5), 2024 30.3°F (+1.6), 2025 25.9°F (−2.8). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 35.8°F | +7.1°F | 2.42 in |
| 2022 | 25.6°F | −3.1°F | 2.25 in |
| 2023 | 38.2°F | +9.5°F | 2.84 in |
| 2024 | 30.3°F | +1.6°F | 1.45 in |
| 2025 | 25.9°F | −2.8°F | 2.68 in |
Source: records: ACIS, station USC00110338; recent months: ACIS, station USC00110338. Records and recent months use complete months only.
How does December in Aurora 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; Aurora's is 36°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.