Weather on May 20
Chicago, IL
55 Years of Data
Avg High
71°F
Avg Low
52°F
Warmest
2012
79°F avg
Coldest
2002
43°F avg
About This Date
May 20th 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 20th was in 2012 (79°F average), while the coldest was 2002 (43°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 17% of May 20th dates historically, with the wettest May 20th recording 1.42" of rain. The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for May 20th 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 | 54° | 48° | 51° | — | — |
| 2024 | 83° | 59° | 71° | — | — |
| 2023 | 70° | 50° | 60° | — | — |
| 2022 | 86° | 56° | 71° | — | — |
| 2021 | 84° | 54° | 69° | — | — |
| 2020 | 57° | 50° | 54° | — | — |
| 2019 | 56° | 45° | 50° | — | — |
| 2018 | 51° | 43° | 47° | — | — |
| 2017 | 59° | 48° | 54° | — | — |
| 2016 | 60° | 51° | 56° | — | — |
| 2015 | 48° | 41° | 45° | — | — |
| 2014 | 85° | 57° | 71° | — | — |
| 2013 | 89° | 65° | 77° | — | — |
| 2012warmest | 92° | 67° | 79° | — | — |
| 2011 | 60° | 47° | 53° | — | — |
| 2010 | 66° | 54° | 60° | — | — |
| 2009 | 84° | 64° | 74° | — | — |
| 2008 | 67° | 50° | 58° | — | — |
| 2007 | 71° | 43° | 57° | — | — |
| 2006 | 75° | 48° | 62° | — | — |
| 2005 | 69° | 51° | 60° | — | — |
| 2004 | 85° | 68° | 76° | 0.05" | — |
| 2003 | 68° | 50° | 59° | 0.33" | — |
| 2002coldest | 49° | 37° | 43° | — | — |
| 2001 | 79° | 55° | 67° | — | — |
| 2000 | 60° | 48° | 54° | — | — |
| 1999 | 82° | 57° | 70° | — | — |
| 1998 | 77° | 60° | 69° | — | — |
| 1997 | 62° | 43° | 52° | — | — |
| 1994 | 74° | 47° | 60° | — | — |
| 1993 | 61° | 48° | 54° | — | — |
| 1992 | 79° | 52° | 65° | — | — |
| 1991 | 63° | 50° | 56° | — | — |
| 1990 | 71° | 52° | 61° | 0.43" | — |
| 1989 | 75° | 61° | 68° | 0.48" | — |
| 1988 | 70° | 52° | 61° | — | — |
| 1987 | 75° | 54° | 64° | 0.08" | — |
| 1986 | 52° | 44° | 48° | 0.03" | — |
| 1985 | 82° | 52° | 67° | 0.97" | — |
| 1984 | 72° | 55° | 63° | 1.42" | — |
| 1983 | 69° | 55° | 62° | — | — |
| 1982 | 79° | 52° | 65° | 0.28" | — |
| 1981 | 66° | 43° | 54° | — | — |
| 1980 | 64° | 49° | 56° | — | — |
| 1979 | 74° | 48° | 61° | — | — |
| 1978 | 82° | 66° | 74° | — | — |
| 1977 | 88° | 65° | 76° | — | — |
| 1976 | 81° | 60° | 70° | — | — |
| 1975 | 84° | 58° | 71° | — | — |
| 1974 | 64° | 51° | 58° | — | — |
| 1973 | 59° | 50° | 55° | — | — |
| 1972 | 77° | 55° | 66° | — | — |
| 1971 | 71° | 51° | 61° | — | — |
53 years of data from CHICAGO GRANT PARK