Weather on May 21
Chicago, IL
55 Years of Data
Avg High
71°F
Avg Low
52°F
Warmest
1977
78°F avg
Coldest
2002
45°F avg
About This Date
May 21st in Chicago, IL typically brings pleasant spring weather, with average highs around 71°F and lows near 52°F. Over 53 years of records, the warmest May 21st was in 1977 (78°F average), while the coldest was 2002 (45°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 11% of May 21st dates historically, with the wettest May 21st recording 2.03" of rain. 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 May 21st in Chicago, IL? Great weather for outdoor activities.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 52° | 48° | 50° | — | — |
| 2024 | 88° | 59° | 73° | — | — |
| 2023 | 80° | 54° | 67° | — | — |
| 2022 | 62° | 52° | 57° | — | — |
| 2021 | 84° | 64° | 74° | — | — |
| 2020 | 60° | 50° | 55° | — | — |
| 2019 | 53° | 45° | 49° | — | — |
| 2018 | 58° | 46° | 52° | — | — |
| 2017 | 66° | 52° | 59° | — | — |
| 2016 | 68° | 53° | 61° | — | — |
| 2015 | 68° | 47° | 57° | — | — |
| 2014 | 79° | 53° | 66° | — | — |
| 2013 | 81° | 59° | 70° | — | — |
| 2012 | 68° | 58° | 63° | — | — |
| 2011 | 70° | 49° | 59° | — | — |
| 2010 | 68° | 54° | 61° | — | — |
| 2009 | 86° | 59° | 73° | — | — |
| 2008 | 62° | 47° | 54° | — | — |
| 2007 | 68° | 45° | 56° | — | — |
| 2006 | 54° | 47° | 50° | — | — |
| 2005 | 74° | 48° | 61° | — | — |
| 2004 | 78° | 52° | 65° | 0.66" | — |
| 2003 | 57° | 46° | 52° | — | — |
| 2002coldest | 57° | 34° | 45° | — | — |
| 2001 | 71° | 54° | 62° | — | — |
| 2000 | 70° | 49° | 59° | — | — |
| 1999 | 80° | 60° | 70° | 2.03" | — |
| 1998 | 78° | 56° | 67° | — | — |
| 1997 | 57° | 40° | 48° | — | — |
| 1994 | 81° | 56° | 68° | — | — |
| 1993 | 65° | 50° | 57° | — | — |
| 1992 | 80° | 60° | 70° | — | — |
| 1991 | 78° | 53° | 66° | — | — |
| 1990 | 56° | 47° | 51° | 0.03" | — |
| 1989 | 79° | 55° | 67° | — | — |
| 1988 | 71° | 52° | 61° | — | — |
| 1987 | 88° | 56° | 72° | 0.03" | — |
| 1986 | 61° | 46° | 53° | — | — |
| 1985 | 62° | 47° | 54° | — | — |
| 1984 | 66° | 54° | 60° | — | — |
| 1983 | 70° | 53° | 61° | — | — |
| 1982 | 58° | 43° | 50° | 0.08" | — |
| 1981 | 76° | 53° | 64° | — | — |
| 1980 | 74° | 50° | 62° | — | — |
| 1979 | 78° | 44° | 61° | — | — |
| 1978 | 82° | 43° | 62° | — | — |
| 1977warmest | 89° | 67° | 78° | 0.03" | — |
| 1976 | 72° | 51° | 61° | — | — |
| 1975 | 80° | 58° | 69° | — | — |
| 1974 | 72° | 58° | 65° | — | — |
| 1973 | — | 55° | — | — | — |
| 1972 | 76° | 58° | 67° | — | — |
| 1971 | 59° | 45° | 52° | — | — |
53 years of data from CHICAGO GRANT PARK