Weather on April 21
Rockford, IL
55 Years of Data
Avg High
61°F
Avg Low
39°F
Warmest
1985
72°F avg
Coldest
1988
33°F avg
About This Date
April 21st in Rockford, IL typically brings mild spring weather, with average highs around 61°F and lows near 39°F. Over 55 years of records, the warmest April 21st was in 1985 (72°F average), while the coldest was 1988 (33°F) — a 39°F range across recorded history. Precipitation has occurred on 38% of recorded April 21st dates, with snow falling 2% of the time. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for April 21st in Rockford, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 38° | 48° | — | — |
| 2024 | 59° | 26° | 43° | — | — |
| 2023 | 59° | 37° | 48° | — | — |
| 2022 | 68° | 46° | 57° | 0.03" | — |
| 2021 | 49° | 31° | 40° | — | — |
| 2020 | 53° | 34° | 43° | — | — |
| 2019 | 80° | 41° | 61° | — | — |
| 2018 | 56° | 38° | 47° | 0.13" | — |
| 2017 | 58° | 40° | 49° | — | — |
| 2016 | 71° | 49° | 60° | — | — |
| 2015 | 54° | 36° | 45° | — | — |
| 2014 | 71° | 53° | 62° | 0.13" | — |
| 2013 | 55° | 32° | 44° | — | — |
| 2012 | 53° | 31° | 42° | — | — |
| 2011 | 55° | 28° | 42° | 0.03" | — |
| 2010 | 72° | 36° | 54° | — | — |
| 2009 | 48° | 33° | 41° | 0.3" | — |
| 2008 | 77° | 49° | 63° | — | — |
| 2007 | 78° | 43° | 60° | — | — |
| 2006 | 69° | 42° | 56° | — | — |
| 2005 | 61° | 42° | 51° | — | — |
| 2004 | 58° | 38° | 48° | 0.15" | — |
| 2003 | 50° | 42° | 46° | — | — |
| 2002 | 43° | 35° | 39° | 0.79" | — |
| 2001 | 82° | 54° | 68° | 0.41" | — |
| 2000 | 60° | 38° | 49° | — | — |
| 1999 | 59° | 42° | 51° | 1.88" | — |
| 1998 | 57° | 41° | 49° | 0.05" | — |
| 1997 | 58° | 38° | 48° | 0.23" | — |
| 1996 | 65° | 36° | 50° | — | — |
| 1995 | 49° | 41° | 45° | 0.03" | — |
| 1994 | 62° | 40° | 51° | — | — |
| 1993 | 58° | 31° | 44° | — | — |
| 1992 | 49° | 37° | 43° | 0.1" | — |
| 1991 | 60° | 35° | 48° | — | — |
| 1990 | 68° | 45° | 56° | — | — |
| 1989 | 65° | 45° | 55° | — | — |
| 1988coldest | 43° | 24° | 33° | 0.15" | 0.3" |
| 1987 | 65° | 42° | 53° | 0.46" | — |
| 1986 | 45° | 30° | 37° | — | — |
| 1985warmest | 86° | 58° | 72° | — | — |
| 1984 | 53° | 42° | 48° | — | — |
| 1983 | 64° | 27° | 45° | — | — |
| 1982 | 56° | 26° | 41° | — | — |
| 1981 | 55° | 28° | 42° | — | — |
| 1980 | 81° | 43° | 62° | — | — |
| 1979 | 60° | 40° | 50° | — | — |
| 1978 | 53° | 31° | 42° | — | — |
| 1977 | 65° | 54° | 59° | 0.97" | — |
| 1976 | 63° | 46° | 54° | 0.89" | — |
| 1975 | 48° | 28° | 38° | — | — |
| 1974 | 70° | 54° | 62° | 2.31" | — |
| 1973 | 70° | 60° | 65° | 8.59" | — |
| 1972 | 43° | 41° | 42° | 5.38" | — |
| 1971 | 62° | 41° | 52° | 0.2" | — |
55 years of data from ROCKFORD GTR ROCKFORD AP