Weather in Chicago, Illinois for December 2025
Chicago typically experiences moderate snowfall in December, with an average of 6 snowy days.
According to Chicago snow forecast for December 2025, no snow is expected in the next 2 weeks.Until now, December 2025 in Chicago is cooler than usual, with temperatures averaging -0.5 °F, this is -4.7 °F below the typical seasonal average.
Expect cooler weather in the next days in Chicago with the forecast suggesting a temperature of 0.7 °F, lower than the historical average.
In general, the average temperature in Chicago at the beginning of December is 3.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 4.6 °F by the end of December.
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Chicago Weather December
Temperatures trend during December in Chicago
December weather in Chicago day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 4° /-2° | 5.3 mm | 2 | |
| Dec. 2 |  Patchy rain possible | 5° /0° | 1 mm | 2 | |
| Dec. 3 |  Partly cloudy | 5° /-1° | 4.8 mm | 2 | |
| Dec. 4 | Overcast | 2° /-3° | 0 mm | 2 | |
| Dec. 5 | Overcast | 3° /-4° | 3.7 mm | 2 | |
| Dec. 6 | Overcast | 3° /-3° | 0 mm | 2 | |
| Dec. 7 | Overcast | 5° /-1° | 1.4 mm | 2 | |
| Dec. 8 | Overcast | 4° /0° | 0.1 mm | 2 | |
| Dec. 9 | Overcast | 6° /1° | 3 mm | 2 | |
| Dec. 10 | Overcast | 6° /1° | 4.2 mm | 2 | |
| Dec. 11 | Overcast | 4° /-1° | 2.5 mm | 2 | |
| Dec. 12 | Partly cloudy | 3° /-2° | 8 mm | 2 | |
| Dec. 13 | Overcast | -10° /-15° | 0 mm | 0.1 | |
| Dec. 14 |  Sunny | -8° /-15° | 0 mm | 0.3 | |
| Dec. 15 |  Cloudy | -3° /-13° | 0 mm | 0.3 | |
| Dec. 16 | Partly cloudy | 1° /-5° | 0 mm | 0.2 | |
| Dec. 17 | Patchy rain possible | 2° /2° | 0.4 mm | 0 | |
| Dec. 18 | Partly cloudy | 6° /3° | 0 mm | 3 | |
| Dec. 19 | Partly cloudy | 3° /-1° | 0 mm | 2 | |
| Dec. 20 | Patchy rain possible | 5° /4° | 3.9 mm | 1 | |
| Dec. 21 | Patchy rain possible | 3° /2° | 0.5 mm | 1 | |
| Dec. 22 | Patchy rain possible | 4° /2° | 1.3 mm | 1 | |
| Dec. 23 | Overcast | 1° /-5° | 0 mm | 1 | |
| Dec. 24 | Sunny | -3° /-7° | 0 mm | 2 | |
| Dec. 25 | Overcast | 3° /-1° | 0 mm | 1 | |
| Dec. 26 | Patchy rain possible | 6° /2° | 0.6 mm | 1 | |
| Dec. 27 | Overcast | 5° /0° | 4.3 mm | 2 | |
| Dec. 28 | Overcast | 5° /1° | 2.8 mm | 2 | |
| Dec. 29 | Overcast | 5° /1° | 2.6 mm | 2 | |
| Dec. 30 | Overcast | 5° /0° | 2.8 mm | 2 | |
| Dec. 31 | Overcast | 3° /-2° | 9.9 mm | 1 | |
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December rainfall patterns in Chicago
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