Climate averages 1991–2020
Bloomington (Illinois), United States weather
in December.
A cold, moderately wet month: the 11th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Bloomington (Illinois), United States: daytime highs average 3.3°C and nights cool to about -4.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 59 mm of rain on roughly 8 days, which makes December a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 20 min on an average December day.
The nearest other city in this atlas is Peoria (Illinois), United States (55 km away). In December its highs average 3.3°C, about as warm as Bloomington (Illinois), United States, with 57 mm of rain.
Among the 498 cities listed in the United States, Bloomington (Illinois), United States ranks joint 411th of 498 for the warmest December highs and joint 209th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Bloomington (Illinois), United States is 7.3°C cooler than that mean.
From December to January, average highs fall by 2.6°C to 0.7°C, and monthly precipitation falls from 59 mm to 58 mm.
The annual picture
December in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bloomington (Illinois), United States climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.7°C-7.3°C | -7.3°C | 58 | 8.3 | 9.610 h |
| February | 3.4°C-5.6°C | -5.6°C | 54 | 7.5 | 10.611 h |
| March | 9.8°C-0.3°C | -0.3°C | 78 | 10.3 | 11.912 h |
| April | 16.3°C5.8°C | 5.8°C | 113 | 12.0 | 13.313 h |
| May | 21.9°C11.9°C | 11.9°C | 119 | 13.5 | 14.414 h |
| June | 26.5°C17.2°C | 17.2°C | 110 | 12.2 | 15.015 h |
| July | 28.2°C19.3°C | 19.3°C | 98 | 10.8 | 14.815 h |
| August | 27.6°C18.7°C | 18.7°C | 82 | 9.4 | 13.814 h |
| September | 24.3°C14.8°C | 14.8°C | 77 | 7.8 | 12.513 h |
| October | 17.4°C8.5°C | 8.5°C | 85 | 8.9 | 11.211 h |
| November | 9.7°C1.6°C | 1.6°C | 77 | 8.4 | 10.010 h |
| December, selected | 3.3°C-4.1°C | -4.1°C | 59 | 8.3 | 9.39 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Peoria (Illinois), United States in DecemberUnited States · 55 kmHigh 3.3°C · Low -4.0°C · 57 mm rain
- Decatur in DecemberUnited States · 72 kmHigh 4.3°C · Low -3.1°C · 63 mm rain
- Champaign in DecemberUnited States · 76 kmHigh 3.9°C · Low -3.5°C · 65 mm rain
- Springfield (Illinois), United States in DecemberUnited States · 94 kmHigh 4.4°C · Low -3.1°C · 59 mm rain
- Joliet in DecemberUnited States · 139 kmHigh 2.6°C · Low -4.5°C · 56 mm rain
- Aurora (Illinois), United States in DecemberUnited States · 153 kmHigh 2.0°C · Low -5.1°C · 55 mm precipitation
- Bolingbrook in DecemberUnited States · 156 kmHigh 2.1°C · Low -4.8°C · 55 mm rain
- Naperville in DecemberUnited States · 161 kmHigh 2.1°C · Low -4.9°C · 55 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bloomington) is explained once on the Bloomington (Illinois), United States year overview and on the Sources, method and limits page.