Weather on December 15
Joliet, IL
55 Years of Data
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" | — |
Joliet, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Joliet, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Joliet, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Joliet, IL
Joliet, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.