Weather on December 31
Chicago, IL
55 Years of Data
Avg High
35°F
Avg Low
23°F
Warmest
2010
51°F avg
Coldest
1976
1°F avg
About This Date
December 31st in Chicago, IL typically brings cold winter weather, with average highs around 35°F and lows near 23°F. Over 55 years of records, the warmest December 31st was in 2010 (51°F average), while the coldest was 1976 (1°F) — a 50°F range across recorded history. Precipitation has occurred on 18% of recorded December 31st dates, with snow falling 7% of the time. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
Planning for December 31st in Chicago, IL? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 35° | 19° | 27° | — | — |
| 2024 | 39° | 34° | 36° | — | — |
| 2023 | 37° | 31° | 34° | — | — |
| 2022 | 35° | 30° | 33° | — | — |
| 2021 | 41° | 32° | 37° | — | — |
| 2020 | 31° | — | — | — | — |
| 2019 | 30° | 26° | 28° | — | — |
| 2018 | 39° | 34° | 36° | — | — |
| 2017 | 15° | 2° | 8° | — | — |
| 2016 | 41° | 28° | 35° | — | — |
| 2015 | 30° | 25° | 27° | — | — |
| 2014 | 20° | 6° | 13° | — | — |
| 2013 | 18° | 5° | 11° | — | — |
| 2012 | 36° | 22° | 29° | — | — |
| 2011 | 44° | 35° | 40° | — | — |
| 2010warmest | 56° | 46° | 51° | 2.67" | — |
| 2009 | 35° | 14° | 25° | — | — |
| 2008 | 29° | 15° | 22° | — | — |
| 2007 | 34° | 30° | 32° | — | — |
| 2006 | 57° | 41° | 49° | — | — |
| 2005 | 37° | 34° | 35° | — | — |
| 2004 | 57° | 32° | 45° | 0.05" | — |
| 2003 | 42° | 29° | 35° | — | — |
| 2002 | 42° | 31° | 36° | — | — |
| 2001 | 23° | 9° | 16° | — | — |
| 2000 | 29° | 16° | 22° | — | — |
| 1999 | 42° | 26° | 34° | — | — |
| 1998 | 19° | 9° | 14° | — | — |
| 1997 | 24° | 13° | 18° | — | — |
| 1996 | 35° | 25° | 30° | — | — |
| 1995 | 36° | 33° | 34° | 0.05" | 0.3" |
| 1994 | 37° | 28° | 33° | 0.33" | 0.6" |
| 1993 | 34° | 17° | 25° | 0.03" | — |
| 1992 | 54° | 24° | 39° | 1.91" | — |
| 1991 | 35° | 31° | 33° | — | — |
| 1990 | 14° | 3° | 9° | 0.05" | 0.5" |
| 1989 | 34° | 28° | 31° | 0.23" | 0.2" |
| 1988 | 36° | 23° | 29° | — | — |
| 1987 | 37° | 26° | 32° | — | — |
| 1986 | 39° | 33° | 36° | — | — |
| 1985 | 39° | 25° | 32° | — | — |
| 1984 | 37° | 34° | 35° | 0.18" | — |
| 1983 | 22° | -2° | 10° | — | — |
| 1982 | 36° | 26° | 31° | — | — |
| 1981 | 38° | 25° | 31° | — | — |
| 1980 | 35° | 24° | 30° | — | — |
| 1979 | 42° | 30° | 36° | — | — |
| 1978 | 36° | 24° | 30° | 1.4" | — |
| 1977 | 36° | 21° | 28° | — | — |
| 1976coldest | 7° | -6° | 1° | — | — |
| 1975 | 34° | 28° | 31° | — | — |
| 1974 | 35° | 32° | 34° | — | — |
| 1973 | 20° | 10° | 15° | — | — |
| 1972 | 38° | 24° | 31° | — | — |
| 1971 | 35° | 25° | 30° | — | — |
55 years of data from CHICAGO GRANT PARK