Weather on June 21
Joliet, IL
55 Years of Data
Avg High
84°F
Avg Low
62°F
Warmest
1988
88°F avg
Coldest
1992
51°F avg
About This Date
June 21st in Joliet, IL typically brings warm summer weather, with average highs around 84°F and lows near 62°F. Over 53 years of records, the warmest June 21st was in 1988 (88°F average), while the coldest was 1992 (51°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 34% of June 21st dates historically, with the wettest June 21st recording 4.06" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 77° | 85° | — | — |
| 2024 | 91° | 66° | 79° | — | — |
| 2023 | 85° | 63° | 74° | — | — |
| 2022 | 92° | 64° | 78° | — | — |
| 2021 | 82° | 64° | 73° | 3.81" | — |
| 2020 | 87° | 68° | 78° | 1.07" | — |
| 2019 | — | 52° | — | — | — |
| 2018 | 81° | 64° | 72° | 1.4" | — |
| 2017 | 79° | 46° | 62° | 0.28" | — |
| 2016 | 88° | 61° | 74° | 2.16" | — |
| 2015 | 82° | 59° | 71° | 1.93" | — |
| 2014 | 83° | 63° | 73° | — | — |
| 2013 | 88° | 64° | 76° | — | — |
| 2012 | 90° | 72° | 81° | 0.03" | — |
| 2011 | 82° | 67° | 74° | 4.06" | — |
| 2010 | 81° | 66° | 73° | — | — |
| 2009 | 86° | 61° | 73° | — | — |
| 2008 | 83° | 58° | 70° | 0.05" | — |
| 2007 | 84° | 60° | 72° | — | — |
| 2006 | 80° | 62° | 71° | 0.05" | — |
| 2005 | 85° | 58° | 71° | — | — |
| 2004 | 73° | 55° | 64° | — | — |
| 2003 | 76° | 50° | 63° | — | — |
| 2002 | 92° | 73° | 82° | — | — |
| 2001 | 77° | 62° | 70° | 0.25" | — |
| 2000 | 82° | 69° | 76° | 3.18" | — |
| 1999 | 82° | 66° | 74° | — | — |
| 1998 | 87° | 68° | 78° | — | — |
| 1997 | 89° | 74° | 81° | — | — |
| 1996 | 85° | 63° | 74° | — | — |
| 1995 | 94° | 73° | 83° | — | — |
| 1994 | 91° | 70° | 80° | — | — |
| 1993 | 82° | 63° | 72° | — | — |
| 1992coldest | 61° | 42° | 51° | — | — |
| 1991 | 96° | 65° | 80° | — | — |
| 1990 | 79° | 56° | 67° | 0.18" | — |
| 1988warmest | 101° | 75° | 88° | — | — |
| 1987 | 83° | 68° | 75° | 0.38" | — |
| 1986 | 89° | 64° | 77° | — | — |
| 1985 | 79° | 52° | 65° | — | — |
| 1984 | 85° | 60° | 72° | — | — |
| 1983 | 81° | 65° | 73° | — | — |
| 1982 | 78° | 52° | 65° | 0.03" | — |
| 1981 | 83° | 62° | 72° | — | — |
| 1980 | 78° | 47° | 62° | — | — |
| 1979 | 92° | 66° | 79° | — | — |
| 1978 | 85° | 55° | 70° | 0.46" | — |
| 1977 | 80° | 53° | 67° | — | — |
| 1976 | 81° | 50° | 65° | — | — |
| 1974 | 90° | — | — | 2.34" | — |
| 1973 | 82° | 60° | 71° | — | — |
| 1972 | 77° | 49° | 63° | — | — |
| 1971 | 85° | 60° | 72° | 0.38" | — |
53 years of data from JOLIET