Weather on December 15
Naperville, IL
55 Years of Data
Avg High
39°F
Avg Low
23°F
Warmest
1971
50°F avg
Coldest
1989
2°F avg
About This Date
December 15th in Naperville, IL typically brings cold winter weather, with average highs around 39°F and lows near 23°F. Over 55 years of records, the warmest December 15th was in 1971 (50°F average), while the coldest was 1989 (2°F) — a 48°F range across recorded history. Precipitation has occurred on 42% of recorded December 15th dates, with snow falling 15% of the time (heaviest snowfall: 7.1"). The last decade has been 6.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 6.8°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Naperville, IL? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 10° | -2° | 4° | — | — |
| 2024 | 39° | 25° | 32° | 1.27" | — |
| 2023 | 49° | 24° | 36° | — | — |
| 2022 | 42° | 31° | 36° | 3.35" | — |
| 2021 | 56° | 34° | 45° | 0.05" | — |
| 2020 | 33° | 16° | 24° | — | — |
| 2019 | 32° | 18° | 25° | — | — |
| 2018 | 40° | 27° | 33° | — | — |
| 2017 | 28° | 13° | 20° | — | — |
| 2016 | 20° | -2° | 9° | — | — |
| 2015 | 54° | 39° | 46° | 0.69" | — |
| 2014 | 49° | 44° | 46° | — | — |
| 2013 | 30° | 10° | 20° | 0.64" | 1.2" |
| 2012 | 50° | 25° | 37° | — | — |
| 2011 | 55° | 42° | 49° | 1.78" | — |
| 2010 | 23° | -3° | 10° | — | — |
| 2009 | 39° | 20° | 29° | — | — |
| 2008 | 49° | 5° | 27° | 0.91" | — |
| 2007 | 27° | 17° | 22° | 0.18" | 1" |
| 2006 | 51° | 38° | 44° | — | — |
| 2005 | 35° | 31° | 33° | 0.2" | 0.2" |
| 2004 | 38° | 18° | 28° | — | — |
| 2003 | 37° | 24° | 31° | — | — |
| 2002 | 46° | 30° | 38° | — | — |
| 2001 | 40° | 29° | 34° | 0.05" | — |
| 2000 | 28° | 4° | 16° | — | — |
| 1999 | 39° | 33° | 36° | 0.13" | — |
| 1998 | 54° | 32° | 43° | — | — |
| 1997 | 46° | 25° | 35° | — | — |
| 1996 | 45° | 32° | 38° | — | — |
| 1995 | 40° | 27° | 33° | — | — |
| 1994 | 37° | 26° | 32° | 0.1" | 0.5" |
| 1993 | 48° | 38° | 43° | 0.15" | — |
| 1992 | 45° | 30° | 37° | 0.53" | — |
| 1991 | 29° | 17° | 23° | 0.1" | — |
| 1990 | 45° | 33° | 39° | — | — |
| 1989coldest | 14° | -11° | 2° | — | — |
| 1988 | 40° | 15° | 27° | — | — |
| 1987 | 35° | 24° | 30° | 2.16" | 7.1" |
| 1986 | 47° | 21° | 34° | — | — |
| 1985 | 33° | 13° | 23° | — | — |
| 1984 | 47° | 34° | 40° | 1.07" | — |
| 1983 | 33° | 23° | 28° | 0.79" | 0.6" |
| 1982 | 38° | 34° | 36° | — | — |
| 1981 | 34° | 15° | 24° | — | — |
| 1980 | 35° | 20° | 27° | — | — |
| 1979 | 44° | 25° | 34° | — | — |
| 1978 | 38° | 22° | 30° | — | — |
| 1977 | 38° | 30° | 34° | — | — |
| 1976 | 42° | 13° | 27° | — | — |
| 1975 | 58° | 30° | 44° | 0.91" | — |
| 1974 | 42° | 35° | 39° | 0.76" | — |
| 1973 | 29° | 22° | 25° | 0.2" | 2.1" |
| 1972 | 25° | 16° | 20° | 0.13" | 1.2" |
| 1971warmest | 61° | 39° | 50° | 4.85" | — |
55 years of data from LISLE - MORTON ARBORETUM