Weather on December 9
Joliet, IL
55 Years of Data
Avg High
37°F
Avg Low
22°F
Warmest
2024
46°F avg
Coldest
1978
7°F avg
About This Date
December 9th in Joliet, IL typically brings cold winter weather, with average highs around 37°F and lows near 22°F. Over 54 years of records, the warmest December 9th was in 2024 (46°F average), while the coldest was 1978 (7°F) — a 39°F range across recorded history. Precipitation has occurred on 39% of recorded December 9th dates, with snow falling 7% of the time (heaviest snowfall: 5"). The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Joliet, IL? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 38° | 19° | 29° | — | — |
| 2024warmest | 56° | 36° | 46° | — | — |
| 2023 | 56° | 35° | 45° | 0.15" | — |
| 2022 | 43° | 33° | 38° | 0.58" | — |
| 2021 | 33° | 25° | 29° | — | — |
| 2020 | 36° | 31° | 33° | — | — |
| 2019 | 47° | 35° | 41° | 0.25" | — |
| 2018 | 28° | 15° | 22° | — | — |
| 2017 | 36° | 16° | 26° | 0.03" | — |
| 2016 | 23° | 18° | 20° | — | — |
| 2015 | 47° | 38° | 42° | — | — |
| 2014 | 37° | 32° | 35° | 0.51" | — |
| 2013 | 25° | 17° | 21° | 0.64" | 3" |
| 2012 | 42° | 35° | 39° | — | — |
| 2011 | 35° | 23° | 29° | 0.08" | 0.2" |
| 2010 | 21° | 4° | 12° | — | — |
| 2009 | 37° | 28° | 33° | 1.6" | — |
| 2008 | 42° | 20° | 31° | 0.56" | — |
| 2007 | 28° | 17° | 23° | — | — |
| 2006 | 24° | 5° | 15° | — | — |
| 2005 | 25° | 10° | 17° | 0.69" | 5" |
| 2004 | 43° | 38° | 40° | — | — |
| 2003 | 45° | 29° | 37° | — | — |
| 2002 | 29° | 13° | 21° | — | — |
| 2001 | 48° | 24° | 36° | — | — |
| 2000 | 23° | 8° | 16° | — | — |
| 1999 | 51° | 31° | 41° | — | — |
| 1998 | 44° | 30° | 37° | — | — |
| 1997 | 32° | 27° | 29° | 0.08" | — |
| 1996 | 26° | 26° | 26° | — | — |
| 1995 | 29° | -3° | 13° | 0.18" | — |
| 1994 | 37° | 29° | 33° | 0.61" | — |
| 1993 | 39° | 27° | 33° | — | — |
| 1992 | 29° | 22° | 25° | — | — |
| 1991 | 50° | 31° | 40° | 0.97" | — |
| 1990 | 47° | 24° | 35° | — | — |
| 1989 | 35° | 12° | 24° | — | — |
| 1988 | 34° | 14° | 24° | — | — |
| 1987 | 54° | 34° | 44° | 0.46" | — |
| 1986 | 42° | 37° | 40° | 0.28" | — |
| 1985 | 41° | 23° | 32° | — | — |
| 1984 | 49° | 23° | 36° | — | — |
| 1983 | 30° | 18° | 24° | 0.15" | 0.3" |
| 1982 | 36° | 9° | 22° | 0.05" | — |
| 1981 | 35° | 23° | 29° | — | — |
| 1980 | 47° | 30° | 38° | 0.61" | — |
| 1979 | 36° | 22° | 29° | — | — |
| 1978coldest | 16° | -3° | 7° | — | — |
| 1977 | 25° | -7° | 9° | 0.76" | — |
| 1976 | 22° | 4° | 13° | — | — |
| 1975 | 33° | 28° | 31° | — | — |
| 1973 | 35° | 26° | 31° | — | — |
| 1972 | 32° | 20° | 26° | — | — |
| 1971 | 47° | 39° | 43° | 0.36" | — |
54 years of data from JOLIET