Weather on December 20
Chicago, IL
55 Years of Data
Avg High
36°F
Avg Low
24°F
Warmest
1988
54°F avg
Coldest
1980
5°F avg
About This Date
December 20th in Chicago, IL typically brings cold winter weather, with average highs around 36°F and lows near 24°F. Over 55 years of records, the warmest December 20th was in 1988 (54°F average), while the coldest was 1980 (5°F) — a 49°F range across recorded history. Precipitation has occurred on 16% of recorded December 20th dates, with snow falling 5% of the time (heaviest snowfall: 1.6"). The last decade has been 10.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.1°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Chicago, IL? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 40° | 24° | 32° | — | — |
| 2024 | 35° | 26° | 31° | — | — |
| 2023 | 44° | 32° | 38° | — | — |
| 2022 | 34° | 24° | 29° | — | — |
| 2021 | 43° | 30° | 36° | — | — |
| 2020 | 41° | 32° | 37° | — | — |
| 2019 | 41° | 26° | 34° | — | — |
| 2018 | 47° | 38° | 42° | — | — |
| 2017 | 38° | 30° | 34° | — | — |
| 2016 | 30° | 16° | 23° | — | — |
| 2015 | 50° | 28° | 39° | — | — |
| 2014 | 34° | 31° | 32° | — | — |
| 2013 | 38° | 34° | 36° | — | — |
| 2012 | 50° | 34° | 42° | — | — |
| 2011 | 40° | 39° | 39° | — | — |
| 2010 | 29° | 17° | 23° | — | — |
| 2009 | 33° | 30° | 32° | — | — |
| 2008 | 33° | 23° | 28° | — | — |
| 2007 | 37° | 28° | 33° | — | — |
| 2006 | 41° | 31° | 36° | — | — |
| 2005 | 25° | 9° | 17° | — | — |
| 2004 | 28° | 10° | 19° | — | — |
| 2003 | 31° | 13° | 22° | — | — |
| 2002 | 36° | 30° | 33° | — | — |
| 2001 | 42° | 28° | 35° | — | — |
| 2000 | 19° | -1° | 9° | — | 1.6" |
| 1999 | 38° | 8° | 23° | — | — |
| 1998 | 37° | 30° | 34° | 0.05" | — |
| 1997 | 38° | 31° | 34° | — | — |
| 1996 | 16° | 3° | 9° | — | — |
| 1995 | 31° | 24° | 27° | — | — |
| 1994 | 44° | 33° | 39° | — | — |
| 1993 | 37° | 33° | 35° | — | — |
| 1992 | 39° | 14° | 27° | 0.46" | 0.1" |
| 1991 | 36° | 28° | 32° | 0.05" | — |
| 1990 | 45° | 31° | 38° | — | — |
| 1989 | 17° | -1° | 8° | — | — |
| 1988warmest | 58° | 50° | 54° | 0.15" | — |
| 1987 | 40° | 34° | 37° | 1.88" | — |
| 1986 | 43° | 31° | 37° | — | — |
| 1985 | 21° | 10° | 16° | — | 0.1" |
| 1984 | 32° | 23° | 28° | — | — |
| 1983 | 23° | 7° | 15° | — | — |
| 1982 | 35° | 31° | 33° | 0.05" | — |
| 1981 | 24° | 15° | 20° | — | — |
| 1980coldest | 11° | 0° | 5° | — | — |
| 1979 | 40° | 32° | 36° | — | — |
| 1978 | 38° | 30° | 34° | 0.36" | — |
| 1977 | 39° | 29° | 34° | 1.32" | — |
| 1976 | 50° | 22° | 36° | 0.18" | — |
| 1975 | 37° | 30° | 34° | — | — |
| 1974 | 32° | 24° | 28° | — | — |
| 1973 | 30° | 16° | 23° | — | — |
| 1972 | 39° | 35° | 37° | — | — |
| 1971 | 40° | 30° | 35° | — | — |
55 years of data from CHICAGO GRANT PARK