Weather on December 15
Joliet, IL
55 Years of Data
Avg High
38°F
Avg Low
23°F
Warmest
1971
50°F avg
Coldest
1989
-2°F avg
About This Date
December 15th in Joliet, IL typically brings cold winter weather, with average highs around 38°F and lows near 23°F. Over 54 years of records, the warmest December 15th was in 1971 (50°F average), while the coldest was 1989 (-2°F) — a 52°F range across recorded history. Precipitation has occurred on 37% of recorded December 15th dates, with snow falling 4% of the time. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Joliet, IL? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 24° | 2° | 13° | — | — |
| 2024 | 40° | 25° | 32° | 1.02" | — |
| 2023 | 51° | 25° | 38° | — | — |
| 2022 | 44° | 33° | 39° | 3.3" | — |
| 2021 | 54° | 35° | 44° | 0.28" | — |
| 2020 | 31° | 21° | 26° | — | — |
| 2019 | 33° | 18° | 25° | — | — |
| 2018 | 41° | 30° | 36° | — | — |
| 2017 | 27° | 16° | 21° | — | — |
| 2016 | 20° | -1° | 10° | — | — |
| 2015 | 56° | 39° | 47° | 0.56" | — |
| 2014 | 49° | 43° | 46° | — | — |
| 2013 | 17° | 7° | 12° | — | — |
| 2012 | 48° | 28° | 38° | — | — |
| 2011 | 57° | 43° | 50° | 2.84" | — |
| 2010 | 17° | 1° | 9° | — | — |
| 2009 | 41° | 23° | 32° | — | — |
| 2008 | 50° | 5° | 28° | 0.66" | — |
| 2007 | 29° | 19° | 24° | — | — |
| 2006 | 53° | 38° | 45° | — | — |
| 2005 | 36° | 27° | 31° | 0.25" | — |
| 2004 | 27° | 16° | 21° | — | — |
| 2003 | 30° | 24° | 27° | — | — |
| 2002 | 38° | 31° | 34° | — | — |
| 2001 | 47° | 31° | 39° | 0.38" | — |
| 2000 | 25° | -6° | 10° | — | — |
| 1999 | 39° | 37° | 38° | 0.33" | — |
| 1998 | 42° | 28° | 35° | — | — |
| 1997 | 38° | 17° | 27° | — | — |
| 1996 | 46° | 33° | 40° | 0.51" | — |
| 1995 | 40° | 30° | 35° | — | — |
| 1994 | 32° | 26° | 29° | 0.03" | — |
| 1993 | 43° | 38° | 40° | 0.25" | — |
| 1992 | 38° | 30° | 34° | 0.25" | — |
| 1991 | 30° | 21° | 26° | — | — |
| 1990 | 37° | 23° | 30° | 0.58" | — |
| 1989coldest | 3° | -8° | -2° | — | — |
| 1988 | 48° | 20° | 34° | — | — |
| 1987 | 35° | 26° | 31° | 0.2" | — |
| 1986 | 45° | 27° | 36° | — | — |
| 1985 | 25° | -6° | 10° | — | — |
| 1984 | 48° | 33° | 41° | — | — |
| 1983 | 35° | 22° | 28° | 1.04" | 0.3" |
| 1982 | 40° | 31° | 35° | 0.15" | — |
| 1981 | 35° | 15° | 25° | — | — |
| 1980 | 36° | 25° | 30° | — | — |
| 1979 | 38° | 18° | 28° | — | — |
| 1978 | 38° | 15° | 26° | — | — |
| 1977 | 35° | 26° | 31° | — | — |
| 1976 | 42° | 22° | 32° | — | — |
| 1975 | 65° | 30° | 47° | — | — |
| 1973 | 28° | 22° | 25° | 0.2" | — |
| 1972 | 29° | 8° | 18° | 0.13" | 0.5" |
| 1971warmest | 62° | 38° | 50° | 4.32" | — |
54 years of data from JOLIET