Weather on April 21
Chicago, IL
55 Years of Data
Avg High
60°F
Avg Low
44°F
Warmest
1985
75°F avg
Coldest
2021
38°F avg
About This Date
April 21st in Chicago, IL typically brings mild spring weather, with average highs around 60°F and lows near 44°F. Over 51 years of records, the warmest April 21st was in 1985 (75°F average), while the coldest was 2021 (38°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 29% of April 21st dates historically, with the wettest April 21st recording 3.3" of rain. The last decade has been 4.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.8°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Chicago, IL? Great weather for outdoor activities.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 48° | 55° | — | — |
| 2024 | 54° | 37° | 45° | — | — |
| 2023 | 61° | 46° | 53° | — | — |
| 2022 | 67° | 49° | 58° | — | — |
| 2021coldest | 43° | 34° | 38° | — | — |
| 2020 | 50° | 37° | 44° | — | — |
| 2019 | 74° | 45° | 59° | — | — |
| 2018 | 45° | 38° | 41° | — | — |
| 2017 | 51° | 44° | 48° | — | — |
| 2016 | 63° | 51° | 57° | — | — |
| 2015 | 54° | 42° | 48° | — | — |
| 2014 | 76° | 59° | 67° | — | — |
| 2013 | 50° | 35° | 43° | — | — |
| 2012 | 51° | 36° | 43° | — | — |
| 2011 | 48° | 40° | 44° | — | — |
| 2010 | 61° | 41° | 51° | — | — |
| 2009 | 45° | 39° | 42° | — | — |
| 2008 | 65° | 45° | 55° | — | — |
| 2007 | 67° | 44° | 55° | — | — |
| 2006 | 72° | 55° | 63° | — | — |
| 2005 | 58° | 45° | 51° | — | — |
| 2004 | 65° | 48° | 56° | 0.08" | — |
| 2003 | 51° | 43° | 47° | 0.03" | — |
| 2001 | 80° | 54° | 67° | 1.14" | — |
| 2000 | 68° | 38° | 53° | 1.22" | — |
| 1999 | 64° | 49° | 56° | 0.05" | — |
| 1998 | 55° | 48° | 52° | 0.2" | — |
| 1994 | 56° | 43° | 49° | — | — |
| 1993 | 47° | 36° | 41° | — | — |
| 1992 | 71° | 47° | 59° | — | — |
| 1991 | 49° | 40° | 44° | — | — |
| 1990 | 61° | 44° | 52° | 1.37" | — |
| 1989 | 70° | 46° | 58° | — | — |
| 1988 | 52° | 35° | 43° | 0.15" | — |
| 1987 | 87° | 47° | 67° | — | — |
| 1986 | 57° | 37° | 47° | 0.05" | — |
| 1985warmest | 84° | 66° | 75° | 0.1" | — |
| 1984 | 51° | 40° | 45° | — | — |
| 1983 | 61° | 40° | 50° | — | — |
| 1982 | 52° | 33° | 42° | — | — |
| 1981 | 50° | 36° | 43° | — | — |
| 1980 | 70° | 45° | 57° | — | — |
| 1979 | 67° | 51° | 59° | 0.15" | — |
| 1978 | 42° | 35° | 39° | 0.28" | — |
| 1977 | 81° | 60° | 70° | 3.3" | — |
| 1976 | 66° | 51° | 59° | — | — |
| 1975 | 43° | 37° | 40° | — | — |
| 1974 | 72° | 61° | 66° | — | — |
| 1973 | 77° | 61° | 69° | 2.13" | — |
| 1972 | 46° | 41° | 44° | — | — |
| 1971 | 48° | 38° | 43° | 0.36" | — |
51 years of data from CHICAGO GRANT PARK