Weather on December 18
Chicago, IL
55 Years of Data
Avg High
35°F
Avg Low
22°F
Warmest
1977
47°F avg
Coldest
1985
6°F avg
About This Date
December 18th in Chicago, IL typically brings cold winter weather, with average highs around 35°F and lows near 22°F. Over 55 years of records, the warmest December 18th was in 1977 (47°F average), while the coldest was 1985 (6°F) — a 41°F range across recorded history. Precipitation has occurred on 16% of recorded December 18th dates, with snow falling 9% of the time (heaviest snowfall: 4.1"). The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for December 18th 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 | 52° | 19° | 35° | — | — |
| 2024 | 37° | 26° | 32° | — | — |
| 2023 | 37° | 23° | 30° | — | — |
| 2022 | 22° | 16° | 19° | — | — |
| 2021 | 40° | 31° | 35° | — | — |
| 2020 | 37° | 27° | 32° | — | — |
| 2019 | 29° | 14° | 21° | — | — |
| 2018 | 42° | 28° | 35° | — | — |
| 2017 | 45° | 42° | 43° | — | — |
| 2016 | 21° | -2° | 10° | — | — |
| 2015 | 33° | 26° | 30° | — | — |
| 2014 | 30° | 24° | 27° | — | — |
| 2013 | 35° | 19° | 27° | — | — |
| 2012 | 42° | 32° | 37° | — | — |
| 2011 | 46° | 29° | 37° | — | — |
| 2010 | 24° | 15° | 20° | — | — |
| 2009 | 38° | 34° | 36° | — | — |
| 2008 | 27° | 16° | 21° | — | — |
| 2007 | 38° | 24° | 31° | — | — |
| 2006 | 45° | 34° | 39° | — | — |
| 2005 | 18° | 8° | 13° | — | — |
| 2004 | 40° | 20° | 30° | 0.03" | — |
| 2003 | 28° | 20° | 24° | — | — |
| 2002 | 55° | 37° | 46° | 2.62" | — |
| 2001 | 48° | 31° | 39° | — | — |
| 2000 | 18° | 1° | 9° | — | 4.1" |
| 1999 | 31° | 14° | 22° | 0.03" | — |
| 1998 | 54° | 34° | 44° | — | — |
| 1997 | 46° | 33° | 40° | — | — |
| 1996 | 19° | 9° | 14° | — | 0.3" |
| 1995 | 36° | 33° | 34° | — | — |
| 1994 | 36° | 24° | 30° | — | — |
| 1993 | 42° | 38° | 40° | 0.89" | — |
| 1992 | 32° | 27° | 29° | — | — |
| 1991 | 38° | 15° | 26° | — | — |
| 1990 | 41° | 34° | 37° | 0.15" | — |
| 1989 | 17° | 5° | 11° | — | — |
| 1988 | 27° | 15° | 21° | — | — |
| 1987 | 33° | 19° | 26° | — | — |
| 1986 | 42° | 30° | 36° | — | — |
| 1985coldest | 17° | -5° | 6° | — | — |
| 1984 | 44° | 21° | 33° | — | — |
| 1983 | 14° | 2° | 8° | 0.13" | 0.2" |
| 1982 | 43° | 32° | 37° | — | — |
| 1981 | 26° | 10° | 18° | 0.81" | 4" |
| 1980 | 38° | 27° | 32° | 0.08" | 0.3" |
| 1979 | 30° | 16° | 23° | — | — |
| 1978 | 41° | 31° | 36° | — | — |
| 1977warmest | 56° | 38° | 47° | 0.05" | — |
| 1976 | 42° | 30° | 36° | — | — |
| 1975 | 15° | 2° | 8° | — | — |
| 1974 | 32° | 19° | 26° | — | — |
| 1973 | 27° | 21° | 24° | — | — |
| 1972 | 40° | 25° | 32° | — | — |
| 1971 | 31° | 11° | 21° | — | — |
55 years of data from CHICAGO GRANT PARK