Weather on May 15
Naperville, IL
55 Years of Data
Avg High
72°F
Avg Low
48°F
Warmest
1998
76°F avg
Coldest
2016
40°F avg
About This Date
May 15th in Naperville, IL typically brings pleasant spring weather, with average highs around 72°F and lows near 48°F. Over 55 years of records, the warmest May 15th was in 1998 (76°F average), while the coldest was 2016 (40°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 15th dates historically, with the wettest May 15th recording 6.1" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for May 15th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 62° | 71° | — | — |
| 2024 | 62° | 50° | 56° | — | — |
| 2023 | 63° | 48° | 55° | 0.18" | — |
| 2022 | 87° | 59° | 73° | — | — |
| 2021 | 73° | 44° | 59° | — | — |
| 2020 | 73° | 55° | 64° | 6.1" | — |
| 2019 | 72° | 44° | 58° | — | — |
| 2018 | 85° | 56° | 70° | 1.3" | — |
| 2017 | 77° | 45° | 61° | — | — |
| 2016coldest | 48° | 32° | 40° | — | — |
| 2015 | 68° | 50° | 59° | 0.51" | — |
| 2014 | 57° | 41° | 49° | 1.27" | — |
| 2013 | 91° | 59° | 75° | — | — |
| 2012 | 79° | 45° | 62° | — | — |
| 2011 | 54° | 45° | 49° | 1.02" | — |
| 2010 | 67° | 43° | 55° | — | — |
| 2009 | 69° | 54° | 61° | 0.08" | — |
| 2008 | 66° | 38° | 52° | — | — |
| 2007 | 90° | 59° | 74° | — | — |
| 2006 | 62° | 46° | 54° | 0.43" | — |
| 2005 | 65° | 42° | 53° | — | — |
| 2004 | 59° | 47° | 53° | 2.64" | — |
| 2003 | 57° | 46° | 52° | 0.33" | — |
| 2002 | 77° | 38° | 57° | — | — |
| 2001 | 90° | 55° | 72° | 0.58" | — |
| 2000 | 73° | 36° | 54° | — | — |
| 1999 | 75° | 50° | 63° | — | — |
| 1998warmest | 90° | 62° | 76° | — | — |
| 1997 | 54° | 37° | 45° | 0.05" | — |
| 1996 | 62° | 47° | 54° | 0.3" | — |
| 1995 | 76° | 44° | 60° | — | — |
| 1994 | 78° | 59° | 69° | 0.25" | — |
| 1993 | 83° | 50° | 66° | — | — |
| 1992 | 72° | 40° | 56° | 0.03" | — |
| 1991 | 87° | 56° | 71° | — | — |
| 1990 | 64° | 52° | 58° | — | — |
| 1989 | 71° | 43° | 57° | — | — |
| 1988 | 83° | 64° | 73° | — | — |
| 1987 | 85° | 49° | 67° | — | — |
| 1986 | 70° | 59° | 64° | — | — |
| 1985 | 85° | 57° | 71° | 1.3" | — |
| 1984 | 70° | 37° | 53° | — | — |
| 1983 | 60° | 44° | 52° | 0.61" | — |
| 1982 | 86° | 55° | 71° | — | — |
| 1981 | 71° | 43° | 57° | 1.93" | — |
| 1980 | 67° | 46° | 56° | — | — |
| 1979 | 67° | 42° | 54° | 0.28" | — |
| 1978 | 60° | 48° | 54° | 0.13" | — |
| 1977 | 86° | 53° | 70° | — | — |
| 1976 | 71° | 52° | 61° | — | — |
| 1975 | 75° | 45° | 60° | 1.04" | — |
| 1974 | 64° | 45° | 54° | 1.98" | — |
| 1973 | 65° | 34° | 49° | — | — |
| 1972 | 65° | 46° | 55° | — | — |
| 1971 | 84° | 55° | 70° | — | — |
55 years of data from LISLE - MORTON ARBORETUM