Weather on May 1
Naperville, IL
55 Years of Data
Avg High
66°F
Avg Low
43°F
Warmest
2001
73°F avg
Coldest
1978
41°F avg
About This Date
May 1st in Naperville, IL typically brings mild spring weather, with average highs around 66°F and lows near 43°F. Over 55 years of records, the warmest May 1st was in 2001 (73°F average), while the coldest was 1978 (41°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 1st dates historically, with the wettest May 1st recording 6.1" of rain. The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
Planning for May 1st in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 44° | 52° | 1.02" | — |
| 2024 | 74° | 45° | 59° | — | — |
| 2023 | 46° | 37° | 42° | 0.53" | — |
| 2022 | 69° | 50° | 60° | 4.47" | — |
| 2021 | 59° | 37° | 48° | — | — |
| 2020 | 57° | 32° | 45° | — | — |
| 2019 | 52° | 40° | 46° | 6.1" | — |
| 2018 | 80° | 55° | 68° | — | — |
| 2017 | 54° | 41° | 47° | 3.56" | — |
| 2016 | 49° | 43° | 46° | 1.8" | — |
| 2015 | 52° | 32° | 42° | — | — |
| 2014 | 51° | 41° | 46° | 0.05" | — |
| 2013 | 83° | 59° | 71° | — | — |
| 2012 | 61° | 46° | 53° | 0.13" | — |
| 2011 | 72° | 52° | 62° | — | — |
| 2010 | 80° | 60° | 70° | 0.25" | — |
| 2009 | 66° | 47° | 56° | 1.14" | — |
| 2008 | 61° | 38° | 49° | — | — |
| 2007 | 70° | 47° | 58° | — | — |
| 2006 | 60° | 54° | 57° | 0.89" | — |
| 2005 | 56° | 30° | 43° | — | — |
| 2004 | 55° | 42° | 49° | 0.38" | — |
| 2003 | 69° | 47° | 58° | 5.79" | — |
| 2002 | 67° | 47° | 57° | — | — |
| 2001warmest | 85° | 62° | 73° | — | — |
| 2000 | 75° | 50° | 63° | 0.13" | — |
| 1999 | 76° | 35° | 55° | — | — |
| 1998 | 69° | 52° | 60° | — | — |
| 1997 | 66° | 34° | 50° | 1.91" | — |
| 1996 | 62° | 41° | 52° | — | — |
| 1995 | 55° | 33° | 44° | 0.13" | — |
| 1994 | 57° | 33° | 45° | 1.68" | — |
| 1993 | 78° | 46° | 62° | — | — |
| 1992 | 89° | 43° | 66° | — | — |
| 1991 | 67° | 48° | 57° | — | — |
| 1990 | 62° | 41° | 52° | — | — |
| 1989 | 61° | 38° | 49° | — | — |
| 1988 | 74° | 40° | 57° | — | — |
| 1987 | 73° | 35° | 54° | — | — |
| 1986 | 67° | 50° | 58° | — | — |
| 1985 | 77° | 49° | 63° | — | — |
| 1984 | 60° | 36° | 48° | — | — |
| 1983 | 64° | 50° | 57° | — | — |
| 1982 | 74° | 46° | 60° | — | — |
| 1981 | 60° | 37° | 49° | 0.28" | — |
| 1980 | 63° | 35° | 49° | — | — |
| 1979 | 57° | 32° | 45° | — | — |
| 1978coldest | 52° | 30° | 41° | — | — |
| 1977 | 78° | 44° | 61° | — | — |
| 1976 | 65° | 39° | 52° | 0.43" | — |
| 1975 | 70° | 40° | 55° | 0.15" | — |
| 1974 | 67° | 38° | 52° | — | — |
| 1973 | 75° | 53° | 64° | 4.57" | — |
| 1972 | 71° | 50° | 61° | 0.46" | — |
| 1971 | 64° | — | — | — | — |
55 years of data from LISLE - MORTON ARBORETUM