Weather on May 31
Joliet, IL
55 Years of Data
Avg High
79°F
Avg Low
56°F
Warmest
1991
79°F avg
Coldest
1983
51°F avg
About This Date
May 31st in Joliet, IL typically brings pleasant spring weather, with average highs around 79°F and lows near 56°F. Over 53 years of records, the warmest May 31st was in 1991 (79°F average), while the coldest was 1983 (51°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 30% of May 31st dates historically, with the wettest May 31st recording 5.59" 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 31st in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 54° | 64° | — | — |
| 2024 | 73° | 48° | 61° | — | — |
| 2023 | 89° | 58° | 73° | — | — |
| 2022 | — | 66° | — | — | — |
| 2021 | 70° | 40° | 55° | — | — |
| 2020 | 72° | 50° | 61° | — | — |
| 2019 | 79° | 60° | 69° | — | — |
| 2018 | 86° | 67° | 76° | 1.91" | — |
| 2017 | 76° | 50° | 63° | 0.05" | — |
| 2016 | 87° | 63° | 75° | — | — |
| 2015 | 68° | 44° | 56° | 1.52" | — |
| 2014 | 82° | 58° | 70° | — | — |
| 2013 | 83° | 63° | 73° | 1.4" | — |
| 2012 | 70° | 53° | 61° | — | — |
| 2011 | 88° | 63° | 75° | — | — |
| 2010 | 90° | 66° | 78° | — | — |
| 2009 | 80° | 48° | 64° | — | — |
| 2008 | 73° | 64° | 69° | 2.29" | — |
| 2007 | 87° | 67° | 77° | — | — |
| 2006 | 93° | 43° | 68° | 0.15" | — |
| 2005 | 75° | 48° | 62° | — | — |
| 2004 | 77° | 64° | 71° | 5.59" | — |
| 2003 | 74° | 51° | 62° | — | — |
| 2002 | 81° | 63° | 72° | — | — |
| 2001 | 63° | 48° | 55° | — | — |
| 2000 | 84° | 60° | 72° | 1.78" | — |
| 1999 | 83° | 60° | 71° | — | — |
| 1998 | 89° | 66° | 78° | — | — |
| 1997 | 72° | 55° | 63° | — | — |
| 1996 | 71° | 42° | 57° | — | — |
| 1995 | 81° | 52° | 66° | — | — |
| 1994 | 89° | 64° | 77° | — | — |
| 1993 | 71° | 51° | 61° | 2.67" | — |
| 1992 | 68° | 47° | 57° | 0.03" | — |
| 1991warmest | 89° | 69° | 79° | 0.03" | — |
| 1990 | 67° | 45° | 56° | — | — |
| 1989 | 87° | 69° | 78° | 0.23" | — |
| 1988 | 92° | 62° | 77° | — | — |
| 1987 | 86° | 66° | 76° | 0.56" | — |
| 1986 | 85° | 59° | 72° | — | — |
| 1985 | 81° | 50° | 65° | — | — |
| 1984 | 70° | 42° | 56° | — | — |
| 1983coldest | 60° | 43° | 51° | 0.18" | — |
| 1981 | 69° | 45° | 57° | — | — |
| 1980 | 84° | 61° | 72° | 3.12" | — |
| 1979 | 82° | 60° | 71° | — | — |
| 1978 | 80° | 57° | 69° | — | — |
| 1977 | 92° | 60° | 76° | — | — |
| 1976 | 74° | 58° | 66° | 0.94" | — |
| 1974 | 75° | 60° | 68° | — | — |
| 1973 | 78° | 50° | 64° | — | — |
| 1972 | 65° | 43° | 54° | — | — |
| 1971 | 89° | 50° | 70° | — | — |
53 years of data from JOLIET