Weather on April 20
Naperville, IL
55 Years of Data
Avg High
63°F
Avg Low
42°F
Warmest
1985
73°F avg
Coldest
2013
35°F avg
About This Date
April 20th in Naperville, IL typically brings mild spring weather, with average highs around 63°F and lows near 42°F. Over 55 years of records, the warmest April 20th was in 1985 (73°F average), while the coldest was 2013 (35°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 36% of April 20th dates historically, with the wettest April 20th recording 3.61" of rain. The last decade has been 8.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 8.1°F cooler on this date compared to 20-30 years ago.
Planning for April 20th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 42° | 51° | — | — |
| 2024 | 56° | 34° | 45° | — | — |
| 2023 | 71° | 45° | 58° | 0.36" | — |
| 2022 | 51° | 36° | 43° | — | — |
| 2021 | 51° | 36° | 43° | 0.2" | — |
| 2020 | 60° | 33° | 47° | — | — |
| 2019 | 54° | 39° | 46° | — | — |
| 2018 | 55° | 25° | 40° | — | — |
| 2017 | 67° | 45° | 56° | 0.2" | — |
| 2016 | 59° | 47° | 53° | — | — |
| 2015 | — | 48° | — | 1.22" | — |
| 2014 | 69° | 36° | 52° | — | — |
| 2013coldest | 39° | 30° | 35° | — | — |
| 2012 | 65° | 42° | 53° | 0.05" | — |
| 2011 | 39° | 35° | 37° | 1.73" | — |
| 2010 | 58° | 34° | 46° | — | — |
| 2009 | 54° | 41° | 47° | 1.55" | — |
| 2008 | 62° | 43° | 52° | — | — |
| 2007 | 59° | 33° | 46° | — | — |
| 2006 | 76° | 48° | 62° | 0.03" | — |
| 2005 | 82° | 53° | 68° | — | — |
| 2004 | 66° | 41° | 54° | — | — |
| 2003 | 76° | 58° | 67° | 0.25" | — |
| 2002 | 60° | 40° | 50° | 2.74" | — |
| 2001 | 78° | 52° | 65° | 0.97" | — |
| 2000 | 68° | 50° | 59° | 2.92" | — |
| 1999 | 59° | 30° | 45° | — | — |
| 1998 | 67° | 35° | 51° | — | — |
| 1997 | 62° | 34° | 48° | 0.05" | — |
| 1996 | 72° | 40° | 56° | 0.66" | — |
| 1995 | 55° | 40° | 47° | — | — |
| 1994 | 70° | 33° | 51° | — | — |
| 1993 | 60° | 37° | 49° | 3.61" | — |
| 1992 | 70° | 61° | 65° | 0.13" | — |
| 1991 | 57° | 38° | 47° | — | — |
| 1990 | 59° | 51° | 55° | 0.03" | — |
| 1989 | 69° | 35° | 52° | — | — |
| 1988 | 54° | 38° | 46° | — | — |
| 1987 | 88° | 46° | 67° | — | — |
| 1986 | 60° | 49° | 54° | — | — |
| 1985warmest | 83° | 63° | 73° | — | — |
| 1984 | 60° | 34° | 47° | — | — |
| 1983 | 56° | 25° | 40° | — | — |
| 1982 | 60° | 38° | 49° | — | — |
| 1981 | 53° | 33° | 43° | 0.23" | — |
| 1980 | 79° | 45° | 62° | — | — |
| 1979 | 68° | 50° | 59° | — | — |
| 1978 | 47° | 37° | 42° | — | — |
| 1977 | 74° | 61° | 67° | 2.92" | — |
| 1976 | 64° | 46° | 55° | — | — |
| 1975 | 50° | 35° | 43° | — | — |
| 1974 | 79° | 42° | 60° | — | — |
| 1973 | 75° | 61° | 68° | — | — |
| 1972 | 55° | 40° | 47° | 0.18" | — |
| 1971 | 78° | 46° | 62° | — | — |
55 years of data from WHEATON 3 SE