Weather on May 9
Naperville, IL
55 Years of Data
Avg High
73°F
Avg Low
46°F
Warmest
2014
77°F avg
Coldest
2010
42°F avg
About This Date
May 9th in Naperville, IL typically brings pleasant spring weather, with average highs around 73°F and lows near 46°F — a 27°F daily swing. Over 55 years of records, the warmest May 9th was in 2014 (77°F average), while the coldest was 2010 (42°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 9th dates historically, with the wettest May 9th recording 3.68" of rain. The last decade has been 10.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 10.6°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 35° | 46° | — | — |
| 2024 | 80° | 51° | 66° | 1.02" | — |
| 2023 | 55° | 47° | 51° | 0.23" | — |
| 2022 | 66° | — | — | — | — |
| 2021 | 54° | 30° | 42° | 2.24" | — |
| 2020 | — | 26° | — | — | — |
| 2019 | 73° | 48° | 61° | 2.82" | — |
| 2018 | 82° | 54° | 68° | 0.76" | — |
| 2017 | 61° | 39° | 50° | 1.3" | — |
| 2016 | 69° | 36° | 52° | — | — |
| 2015 | 82° | 63° | 72° | 3.68" | — |
| 2014warmest | 90° | 64° | 77° | 1.68" | — |
| 2013 | 78° | 46° | 62° | — | — |
| 2012 | 70° | 47° | 58° | — | — |
| 2011 | 70° | 45° | 57° | — | — |
| 2010coldest | 52° | 33° | 42° | — | — |
| 2009 | 73° | 53° | 63° | 0.1" | — |
| 2008 | 60° | 37° | 49° | — | — |
| 2007 | 83° | 60° | 71° | 0.03" | — |
| 2006 | 72° | 52° | 62° | — | — |
| 2005 | 85° | 62° | 73° | 0.13" | — |
| 2004 | 88° | 54° | 71° | — | — |
| 2003 | 85° | 51° | 68° | 2.82" | — |
| 2002 | 69° | 52° | 60° | 0.81" | — |
| 2001 | 82° | 47° | 64° | — | — |
| 2000 | 84° | 58° | 71° | 3.43" | — |
| 1999 | 70° | 52° | 61° | — | — |
| 1998 | 76° | 49° | 62° | — | — |
| 1997 | 73° | 45° | 59° | — | — |
| 1996 | 73° | 50° | 62° | 1.57" | — |
| 1995 | 76° | 49° | 62° | 2.79" | — |
| 1994 | 73° | 52° | 62° | — | — |
| 1993 | 89° | 63° | 76° | — | — |
| 1992 | 79° | 39° | 59° | — | — |
| 1991 | 78° | 46° | 62° | 0.1" | — |
| 1990 | 80° | 57° | 69° | — | — |
| 1989 | 64° | 43° | 53° | — | — |
| 1988 | 62° | 52° | 57° | 1.42" | — |
| 1987 | 85° | 52° | 68° | — | — |
| 1986 | 78° | 45° | 61° | — | — |
| 1985 | 83° | 47° | 65° | — | — |
| 1984 | 60° | 42° | 51° | — | — |
| 1983 | 59° | 28° | 44° | — | — |
| 1982 | 82° | 43° | 62° | — | — |
| 1981 | 75° | — | — | — | — |
| 1980 | 68° | 30° | 49° | — | — |
| 1979 | 87° | 65° | 76° | — | — |
| 1978 | 70° | 48° | 59° | 0.1" | — |
| 1977 | 58° | 32° | 45° | — | — |
| 1976 | 76° | 43° | 59° | — | — |
| 1975 | 74° | 46° | 60° | — | — |
| 1974 | 51° | 39° | 45° | — | — |
| 1973 | 74° | 41° | 57° | — | — |
| 1972 | 61° | 33° | 47° | 0.25" | — |
| 1971 | 72° | 40° | 56° | 0.46" | — |
55 years of data from LISLE - MORTON ARBORETUM