Weather on December 9
Naperville, IL
55 Years of Data
About This Date
December 9th in Naperville, IL typically brings cold winter weather, with average highs around 37°F and lows near 21°F. Over 55 years of records, the warmest December 9th was in 2023 (48°F average), while the coldest was 1978 (4°F) — a 44°F range across recorded history. Precipitation has occurred on 44% of recorded December 9th dates, with snow falling 24% of the time (heaviest snowfall: 6"). The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for December 9th in Naperville, IL? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 28° | 15° | 22° | — | — |
| 2024 | 54° | 37° | 45° | 0.03" | — |
| 2023warmest | 54° | 42° | 48° | 0.71" | — |
| 2022 | 41° | 26° | 34° | 0.48" | — |
| 2021 | 35° | 20° | 27° | — | — |
| 2020 | 35° | 28° | 32° | — | — |
| 2019 | 47° | 34° | 40° | 0.08" | — |
| 2018 | 32° | 9° | 20° | — | — |
| 2017 | 36° | 16° | 26° | 0.03" | 0.2" |
| 2016 | 23° | 16° | 19° | — | — |
| 2015 | 47° | 39° | 43° | — | — |
| 2014 | 37° | 32° | 35° | 0.51" | — |
| 2013 | 24° | 19° | 22° | 0.51" | 2.5" |
| 2012 | 42° | 34° | 38° | — | — |
| 2011 | 36° | 22° | 29° | 0.08" | 0.4" |
| 2010 | 26° | 2° | 14° | — | — |
| 2009 | 34° | 27° | 30° | 1.65" | 0.9" |
| 2008 | 41° | 11° | 26° | 1.57" | — |
| 2007 | 25° | 14° | 19° | 0.13" | — |
| 2006 | 34° | 18° | 26° | — | — |
| 2005 | 25° | 9° | 17° | 1.24" | 6" |
| 2004 | 50° | 35° | 43° | — | — |
| 2003 | 45° | 41° | 43° | — | — |
| 2002 | 32° | 5° | 19° | — | — |
| 2001 | 47° | 20° | 33° | — | — |
| 2000 | 32° | 8° | 20° | — | — |
| 1999 | 55° | 39° | 47° | — | — |
| 1998 | 50° | 27° | 38° | — | — |
| 1997 | 35° | 28° | 32° | 0.28" | 1" |
| 1996 | 41° | 25° | 33° | — | — |
| 1995 | 26° | -5° | 11° | 0.36" | 3.3" |
| 1994 | 37° | 29° | 33° | 0.74" | — |
| 1993 | 51° | 30° | 41° | — | — |
| 1992 | 31° | 20° | 25° | — | — |
| 1991 | 49° | 26° | 37° | 0.05" | — |
| 1990 | 56° | 25° | 40° | — | — |
| 1989 | 38° | 12° | 25° | — | — |
| 1988 | 31° | 15° | 23° | — | — |
| 1987 | 54° | 40° | 47° | — | — |
| 1986 | 40° | 31° | 35° | 0.51" | — |
| 1985 | 41° | 24° | 33° | — | — |
| 1984 | 49° | 20° | 34° | — | — |
| 1983 | 32° | 20° | 26° | 0.25" | 2.5" |
| 1982 | 29° | 10° | 19° | 0.1" | 0.4" |
| 1981 | 32° | 20° | 26° | — | — |
| 1980 | 38° | 29° | 33° | 0.15" | 0.8" |
| 1979 | 45° | 22° | 33° | — | — |
| 1978coldest | 12° | -4° | 4° | — | — |
| 1977 | 23° | -6° | 9° | 0.76" | 4.4" |
| 1976 | 33° | 7° | 20° | — | — |
| 1975 | 35° | 25° | 30° | 0.25" | 1.2" |
| 1974 | 27° | 9° | 18° | — | — |
| 1973 | 35° | 25° | 30° | — | — |
| 1972 | 28° | 9° | 18° | 0.33" | 3.2" |
| 1971 | 45° | 36° | 40° | 0.81" | — |