Weather in Chicago in December
December in Chicago is cold with average temperatures around 0.4°C (32.7°F). Moderate rainfall of 58mm spread over 9 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
2.6°C
36.7°F
Low
-1.7°C
28.9°F
Precipitation
58 mm
2.3 inches
~9 rainy days
Conditions
Humidity
85%
Comparison to Adjacent Months
December is 5.7°C cooler than November.
December is 3.0°C warmer than January.