Weather on December 15
Rockford, IL
55 Years of Data
About This Date
December 15th in Rockford, IL typically brings cold winter weather, with average highs around 36°F and lows near 21°F. Over 55 years of records, the warmest December 15th was in 2021 (60°F average), while the coldest was 1989 (0°F) — a 60°F range across recorded history. Precipitation has occurred on 38% of recorded December 15th dates, with snow falling 22% of the time (heaviest snowfall: 10.6"). The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Rockford, 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 | 23° | 1° | 12° | — | — |
| 2024 | 43° | 37° | 40° | 0.13" | — |
| 2023 | 53° | 24° | 39° | — | — |
| 2022 | 35° | 29° | 32° | 0.23" | 0.3" |
| 2021warmest | 69° | 50° | 60° | 0.03" | — |
| 2020 | 33° | 16° | 25° | — | — |
| 2019 | 26° | 18° | 22° | 0.1" | 0.3" |
| 2018 | 49° | 21° | 35° | — | — |
| 2017 | 36° | 23° | 30° | — | — |
| 2016 | 8° | -6° | 1° | — | — |
| 2015 | 42° | 37° | 40° | — | — |
| 2014 | 46° | 42° | 44° | 0.53" | — |
| 2013 | 21° | 10° | 16° | — | — |
| 2012 | 48° | 41° | 45° | 0.91" | — |
| 2011 | 56° | 29° | 42° | 0.08" | — |
| 2010 | 22° | -3° | 10° | — | — |
| 2009 | 24° | 2° | 13° | — | — |
| 2008 | 18° | 3° | 10° | — | 0.1" |
| 2007 | 29° | 18° | 23° | 0.51" | 3.8" |
| 2006 | 43° | 28° | 35° | — | — |
| 2005 | 34° | 20° | 27° | 0.05" | 0.5" |
| 2004 | 38° | 14° | 26° | — | — |
| 2003 | 37° | 24° | 31° | — | — |
| 2002 | 46° | 30° | 38° | — | — |
| 2001 | 40° | 32° | 36° | — | — |
| 2000 | 30° | 7° | 18° | — | — |
| 1999 | 36° | 31° | 33° | 0.15" | — |
| 1998 | 49° | 32° | 40° | — | — |
| 1997 | 40° | 21° | 30° | — | — |
| 1996 | 42° | 26° | 34° | 0.43" | — |
| 1995 | 32° | 22° | 27° | — | — |
| 1994 | 34° | 25° | 29° | 0.25" | 1" |
| 1993 | 50° | 34° | 42° | — | — |
| 1992 | 40° | 34° | 37° | 4.22" | — |
| 1991 | 29° | 7° | 18° | 0.03" | 0.2" |
| 1990 | 38° | 33° | 35° | 0.81" | — |
| 1989coldest | 15° | -16° | 0° | — | 0.1" |
| 1988 | 28° | 3° | 16° | — | — |
| 1987 | 32° | 26° | 29° | 2.49" | 10.6" |
| 1986 | 37° | 16° | 26° | — | — |
| 1985 | 28° | 13° | 20° | — | — |
| 1984 | 51° | 32° | 42° | — | — |
| 1983 | 29° | 22° | 25° | 0.23" | 1.1" |
| 1982 | 35° | 32° | 34° | 0.38" | 2.2" |
| 1981 | 22° | 10° | 16° | — | — |
| 1980 | 33° | 20° | 26° | — | — |
| 1979 | 43° | 23° | 33° | — | — |
| 1978 | 37° | 24° | 31° | — | — |
| 1977 | 37° | 30° | 34° | — | — |
| 1976 | 32° | 13° | 22° | — | — |
| 1975 | 33° | 22° | 27° | — | — |
| 1974 | 40° | 33° | 36° | 0.89" | — |
| 1973 | 28° | 15° | 22° | 0.66" | 2.8" |
| 1972 | 19° | 6° | 13° | — | — |
| 1971 | 58° | 37° | 47° | 4.34" | — |