Weather on December 17
Rockford, IL
55 Years of Data
Avg High
30°F
Avg Low
17°F
Warmest
1977
44°F avg
Coldest
1985
1°F avg
About This Date
December 17th in Rockford, IL typically brings very cold winter weather, with average highs around 30°F and lows near 17°F. Over 55 years of records, the warmest December 17th was in 1977 (44°F average), while the coldest was 1985 (1°F) — a 43°F range across recorded history. Precipitation has occurred on 27% of recorded December 17th dates, with snow falling 18% of the time (heaviest snowfall: 2"). The last decade has been 7.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 7.0°F warmer on this date compared to 20-30 years ago.
Planning for December 17th in Rockford, IL? Bundle up with warm layers and protect extremities from the cold.
Warming Trend
2.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 39° | 27° | 33° | — | — |
| 2024 | 39° | 32° | 36° | — | — |
| 2023 | 43° | 33° | 38° | — | — |
| 2022 | 24° | 19° | 22° | 0.03" | 0.1" |
| 2021 | 39° | 19° | 29° | — | — |
| 2020 | 38° | 21° | 30° | — | — |
| 2019 | 28° | 18° | 23° | — | — |
| 2018 | 41° | 23° | 32° | — | — |
| 2017 | 40° | 27° | 34° | 0.03" | — |
| 2016 | 20° | 13° | 17° | 0.33" | 2" |
| 2015 | 34° | 26° | 30° | — | — |
| 2014 | 26° | 23° | 25° | — | — |
| 2013 | 34° | 16° | 25° | 0.03" | 0.1" |
| 2012 | 37° | 30° | 34° | — | — |
| 2011 | 31° | 23° | 27° | 0.23" | 1.6" |
| 2010 | 17° | 9° | 13° | — | — |
| 2009 | 30° | 13° | 21° | — | — |
| 2008 | 18° | 5° | 11° | 0.03" | — |
| 2007 | 23° | 14° | 19° | — | — |
| 2006 | 50° | 35° | 43° | — | — |
| 2005 | 17° | 6° | 12° | — | — |
| 2004 | 32° | 15° | 24° | — | — |
| 2003 | 23° | 19° | 21° | — | — |
| 2002 | 37° | 29° | 33° | — | — |
| 2001 | 44° | 29° | 36° | — | — |
| 2000 | 12° | -4° | 4° | — | — |
| 1999 | 24° | 9° | 16° | 0.36" | 1.4" |
| 1998 | 38° | 23° | 30° | — | — |
| 1997 | 40° | 15° | 27° | — | — |
| 1996 | 27° | 15° | 21° | — | — |
| 1995 | 35° | 19° | 27° | — | — |
| 1994 | 38° | 30° | 34° | — | — |
| 1993 | 40° | 34° | 37° | 0.2" | — |
| 1992 | 30° | 21° | 26° | — | — |
| 1991 | 36° | 20° | 28° | — | — |
| 1990 | 36° | 32° | 34° | 0.53" | — |
| 1989 | 17° | 4° | 10° | — | — |
| 1988 | 22° | 8° | 15° | 0.03" | 0.1" |
| 1987 | 23° | 6° | 15° | — | — |
| 1986 | 37° | 29° | 33° | — | — |
| 1985coldest | 9° | -7° | 1° | 0.13" | 0.5" |
| 1984 | 34° | 22° | 28° | — | — |
| 1983 | 4° | 0° | 2° | 0.03" | 0.2" |
| 1982 | 30° | 4° | 17° | — | — |
| 1981 | 21° | 7° | 14° | — | — |
| 1980 | 36° | 23° | 29° | — | — |
| 1979 | 17° | -5° | 6° | — | — |
| 1978 | 32° | 15° | 24° | — | — |
| 1977warmest | 50° | 37° | 44° | 0.13" | — |
| 1976 | 37° | 18° | 27° | — | — |
| 1975 | 11° | 3° | 7° | — | — |
| 1974 | 28° | 17° | 23° | 0.08" | 0.3" |
| 1973 | 23° | -2° | 11° | — | — |
| 1972 | 27° | -9° | 9° | — | — |
| 1971 | 28° | 8° | 18° | 0.03" | 0.2" |
55 years of data from ROCKFORD GTR ROCKFORD AP