Weather on June 20
Joliet, IL
55 Years of Data
Avg High
83°F
Avg Low
61°F
Warmest
1971
83°F avg
Coldest
1980
58°F avg
About This Date
June 20th in Joliet, IL typically brings warm summer weather, with average highs around 83°F and lows near 61°F. Over 53 years of records, the warmest June 20th was in 1971 (83°F average), while the coldest was 1980 (58°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 25% of June 20th dates historically, with the wettest June 20th recording 2.57" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 64° | 74° | — | — |
| 2024 | 90° | 72° | 81° | — | — |
| 2023 | 85° | 62° | 73° | — | — |
| 2022 | 84° | 54° | 69° | — | — |
| 2021 | 87° | 65° | 76° | — | — |
| 2020 | 91° | 64° | 78° | — | — |
| 2019 | 77° | 54° | 65° | 2.57" | — |
| 2018 | 91° | 66° | 79° | 0.51" | — |
| 2017 | 79° | 56° | 67° | 0.03" | — |
| 2016 | 89° | 61° | 75° | — | — |
| 2015 | 71° | 56° | 63° | — | — |
| 2014 | 83° | 63° | 73° | 1.27" | — |
| 2013 | 78° | 58° | 68° | — | — |
| 2012 | 91° | 72° | 81° | — | — |
| 2011 | 82° | 68° | 75° | — | — |
| 2010 | 89° | 63° | 76° | — | — |
| 2009 | 86° | 61° | 73° | 0.64" | — |
| 2008 | 80° | 55° | 68° | — | — |
| 2007 | 81° | 60° | 70° | — | — |
| 2006 | 91° | 60° | 76° | — | — |
| 2005 | 82° | 55° | 69° | — | — |
| 2004 | 66° | 51° | 59° | — | — |
| 2003 | 70° | 52° | 61° | — | — |
| 2002 | 86° | 66° | 76° | — | — |
| 2001 | 87° | 67° | 77° | — | — |
| 2000 | 81° | 58° | 69° | — | — |
| 1999 | 78° | 56° | 67° | — | — |
| 1998 | 83° | 67° | 75° | — | — |
| 1997 | 88° | 61° | 74° | — | — |
| 1996 | 77° | 63° | 70° | 0.03" | — |
| 1995 | 91° | 68° | 80° | — | — |
| 1994 | 86° | 71° | 79° | — | — |
| 1993 | 84° | 63° | 73° | 1.14" | — |
| 1992 | 71° | 51° | 61° | 0.28" | — |
| 1991 | 99° | 68° | 83° | — | — |
| 1990 | 73° | 58° | 65° | 1.09" | — |
| 1988 | 91° | 59° | 75° | — | — |
| 1987 | 86° | 71° | 79° | — | — |
| 1986 | 96° | 64° | 80° | — | — |
| 1985 | 72° | 49° | 60° | — | — |
| 1984 | 86° | 63° | 74° | — | — |
| 1983 | 80° | 63° | 71° | 0.05" | — |
| 1982 | 74° | 53° | 63° | — | — |
| 1981 | 77° | 60° | 69° | — | — |
| 1980coldest | 73° | 43° | 58° | 0.2" | — |
| 1979 | 85° | 62° | 73° | — | — |
| 1978 | 83° | 61° | 72° | — | — |
| 1977 | 84° | 59° | 72° | — | — |
| 1976 | 76° | 53° | 64° | — | — |
| 1974 | 90° | — | — | — | — |
| 1973 | 81° | 58° | 69° | 1.22" | — |
| 1972 | 89° | 66° | 78° | 2.46" | — |
| 1971warmest | 95° | 72° | 83° | — | — |
53 years of data from JOLIET