Weather on April 20
Joliet, IL
55 Years of Data
Avg High
64°F
Avg Low
44°F
Warmest
1985
75°F avg
Coldest
2013
34°F avg
About This Date
April 20th in Joliet, IL typically brings mild spring weather, with average highs around 64°F and lows near 44°F. Over 54 years of records, the warmest April 20th was in 1985 (75°F average), while the coldest was 2013 (34°F) — a 41°F range across recorded history. Rain or other precipitation has occurred on about 44% of April 20th dates historically, with the wettest April 20th recording 3.81" of rain. The last decade has been 7.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 7.8°F cooler on this date compared to 20-30 years ago.
Planning for April 20th in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 47° | 56° | — | — |
| 2024 | 57° | 34° | 45° | — | — |
| 2023 | 78° | 44° | 61° | 1.37" | — |
| 2022 | 49° | 35° | 42° | — | — |
| 2021 | 56° | 37° | 46° | 0.13" | — |
| 2020 | 61° | 32° | 46° | — | — |
| 2019 | 52° | 40° | 46° | — | — |
| 2018 | 54° | 30° | 42° | — | — |
| 2017 | 68° | 49° | 58° | 0.05" | — |
| 2016 | 64° | 51° | 58° | — | — |
| 2015 | 71° | 50° | 61° | 1.78" | — |
| 2014 | 69° | 38° | 53° | — | — |
| 2013coldest | 38° | 31° | 34° | — | — |
| 2012 | 76° | 46° | 61° | — | — |
| 2011 | 42° | 36° | 39° | 1.6" | — |
| 2010 | 59° | 38° | 48° | — | — |
| 2009 | 59° | 44° | 52° | 1.32" | — |
| 2008 | 73° | 48° | 61° | 0.1" | — |
| 2007 | 59° | 41° | 50° | — | — |
| 2006 | 73° | 54° | 63° | — | — |
| 2005 | 80° | 59° | 70° | — | — |
| 2004 | 72° | 48° | 60° | — | — |
| 2003 | 80° | 63° | 71° | 0.08" | — |
| 2002 | 71° | 44° | 58° | 1.83" | — |
| 2001 | 69° | 40° | 54° | 1.02" | — |
| 2000 | 63° | 49° | 56° | 1.65" | — |
| 1999 | 57° | 35° | 46° | 0.03" | — |
| 1998 | 64° | 40° | 52° | — | — |
| 1997 | 54° | 40° | 47° | 0.2" | — |
| 1996 | 75° | 53° | 64° | 3.81" | — |
| 1995 | 53° | 41° | 47° | — | — |
| 1994 | 70° | 40° | 55° | — | — |
| 1993 | 61° | 42° | 51° | 3.56" | — |
| 1992 | 68° | 60° | 64° | 0.18" | — |
| 1991 | 56° | 40° | 48° | — | — |
| 1990 | 55° | 39° | 47° | — | — |
| 1989 | 61° | 33° | 47° | — | — |
| 1988 | 53° | 29° | 41° | — | — |
| 1987 | 80° | 54° | 67° | — | — |
| 1986 | 73° | 48° | 61° | — | — |
| 1985warmest | 85° | 65° | 75° | — | — |
| 1984 | 61° | 34° | 47° | 0.05" | — |
| 1983 | 45° | 25° | 35° | — | — |
| 1982 | 65° | 42° | 53° | 0.2" | — |
| 1981 | 53° | 35° | 44° | 0.79" | — |
| 1980 | 73° | 49° | 61° | — | — |
| 1979 | 69° | 48° | 59° | 0.1" | — |
| 1978 | 53° | 38° | 45° | — | — |
| 1977 | 72° | 60° | 66° | 1.63" | — |
| 1976 | 72° | 50° | 61° | 0.99" | — |
| 1974 | 81° | 48° | 64° | — | — |
| 1973 | 76° | 60° | 68° | — | — |
| 1972 | 54° | 41° | 47° | 0.33" | — |
| 1971 | 79° | 50° | 64° | 0.1" | — |
54 years of data from JOLIET