Bloomington weather in December: Bloomington, Illinois: normal highs, lows, rain and records for December
Bloomington in December has a normal high of 35°F and a normal low of 21°F, a daily mean of 28°F, falling from 40°F on the 1st to 32°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 2.28 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 58 mm of precipitation in December.
- NOAA stationBloomington (5 mi W)
- Station IDUSC00110764
- Location40.49°N 89.09°W
- Elevation852 ft (260 m)
- From the center6 miles
- Population79,232
- Jan 31° 16°
- Feb 36° 19°
- Mar 49° 29°
- Apr 62° 39°
- May 72° 50°
- Jun 81° 60°
- Jul 84° 63°
- Aug 83° 61°
- Sep 76° 54°
- Oct 63° 42°
- Nov 48° 30°
- 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 Bloomington in December?
The normal high is 35°F and the normal low 21°F, for a daily mean of 28.3°F. December is 10.6°F cooler than November and 5.1°F warmer than January. December is the 10th warmest month of the year in Bloomington and the 11th wettest. Across the month the normal high falls 8°F, from 40°F on December 1 to 32°F on December 31. From one year to the next December's mean temperature typically moves about 5.2°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 23°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 40°F | 25°F | 29% | 19% |
| December 8 | 37°F | 23°F | 31% | 20% |
| December 15 | 35°F | 21°F | 32% | 21% |
| December 22 | 34°F | 20°F | 32% | 20% |
| December 31 | 32°F | 18°F | 30% | 19% |
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 | 40°F | 25°F | 29% | 19% | 9 h 30 min |
| December 2 | 40°F | 24°F | 29% | 19% | 9 h 30 min |
| December 3 | 39°F | 24°F | 29% | 19% | 9 h 30 min |
| December 4 | 39°F | 24°F | 30% | 19% | 9 h 30 min |
| December 5 | 39°F | 24°F | 30% | 19% | 9 h 30 min |
| December 6 | 38°F | 23°F | 30% | 20% | 9 h 30 min |
| December 7 | 38°F | 23°F | 30% | 20% | 9 h 20 min |
| December 8 | 37°F | 23°F | 31% | 20% | 9 h 20 min |
| December 9 | 37°F | 23°F | 31% | 20% | 9 h 20 min |
| December 10 | 37°F | 22°F | 31% | 20% | 9 h 20 min |
| December 11 | 37°F | 22°F | 31% | 20% | 9 h 20 min |
| December 12 | 36°F | 22°F | 32% | 20% | 9 h 20 min |
| December 13 | 36°F | 22°F | 32% | 20% | 9 h 20 min |
| December 14 | 36°F | 22°F | 32% | 20% | 9 h 20 min |
| December 15 | 35°F | 21°F | 32% | 21% | 9 h 20 min |
| December 16 | 35°F | 21°F | 32% | 21% | 9 h 20 min |
| December 17 | 35°F | 21°F | 32% | 20% | 9 h 20 min |
| December 18 | 35°F | 21°F | 32% | 20% | 9 h 20 min |
| December 19 | 34°F | 21°F | 32% | 20% | 9 h 20 min |
| December 20 | 34°F | 20°F | 32% | 20% | 9 h 20 min |
| December 21 | 34°F | 20°F | 32% | 20% | 9 h 20 min |
| December 22 | 34°F | 20°F | 32% | 20% | 9 h 20 min |
| December 23 | 33°F | 20°F | 31% | 20% | 9 h 20 min |
| December 24 | 33°F | 20°F | 31% | 20% | 9 h 20 min |
| December 25 | 33°F | 19°F | 31% | 20% | 9 h 20 min |
| December 26 | 33°F | 19°F | 31% | 20% | 9 h 20 min |
| December 27 | 33°F | 19°F | 31% | 19% | 9 h 20 min |
| December 28 | 33°F | 19°F | 31% | 19% | 9 h 20 min |
| December 29 | 32°F | 19°F | 30% | 19% | 9 h 20 min |
| December 30 | 32°F | 18°F | 30% | 19% | 9 h 20 min |
| December 31 | 32°F | 18°F | 30% | 19% | 9 h 20 min |
- Normal high
- 35°FDecember average
- Normal low
- 21°FDecember average
- Precipitation
- 2.28 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 30 min to 9 h 20 minDecember 1 to December 31
- Sunshine
- 62%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00110764; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Bloomington in December?
On a given December day the chance of 0.01 inch or more is 31% on average, highest around December 16 (32%). In all, 2.28 in falls on 10 days of a normal December.
In a normal December in Bloomington, 27 nights fall to freezing and 13 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00110764.
How does December in Bloomington 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; Bloomington's is 35°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.