Weather on September 17
Naperville, IL
55 Years of Data
Avg High
76°F
Avg Low
52°F
Warmest
1988
77°F avg
Coldest
1981
49°F avg
About This Date
September 17th in Naperville, IL typically brings pleasant fall weather, with average highs around 76°F and lows near 52°F. Over 55 years of records, the warmest September 17th was in 1988 (77°F average), while the coldest was 1981 (49°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 16% of September 17th dates historically, with the wettest September 17th recording 3.68" of rain. The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for September 17th in Naperville, IL? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 52° | 68° | — | — |
| 2024 | 89° | — | — | — | — |
| 2023 | 68° | 53° | 61° | 3.56" | — |
| 2022 | 82° | 62° | 72° | — | — |
| 2021 | 82° | 51° | 67° | — | — |
| 2020 | 83° | 58° | 70° | — | — |
| 2019 | 77° | 64° | 71° | — | — |
| 2018 | 88° | 62° | 75° | — | — |
| 2017 | 87° | 61° | 74° | — | — |
| 2016 | 82° | 66° | 74° | 0.13" | — |
| 2015 | 83° | 56° | 69° | — | — |
| 2014 | 67° | 41° | 54° | — | — |
| 2013 | 65° | 45° | 55° | — | — |
| 2012 | 77° | 46° | 62° | — | — |
| 2011 | 58° | 43° | 50° | — | — |
| 2010 | 69° | 45° | 57° | — | — |
| 2009 | 73° | 44° | 59° | — | — |
| 2008 | 72° | 45° | 58° | — | — |
| 2007 | 72° | 45° | 58° | — | — |
| 2006 | 83° | 57° | 70° | — | — |
| 2005 | 77° | 47° | 62° | — | — |
| 2004 | 74° | 49° | 61° | — | — |
| 2003 | 83° | 50° | 66° | — | — |
| 2002 | 79° | 47° | 63° | — | — |
| 2001 | 75° | 52° | 63° | — | — |
| 2000 | 81° | 51° | 66° | — | — |
| 1999 | 76° | 43° | 59° | — | — |
| 1998 | 82° | 62° | 72° | — | — |
| 1997 | 87° | 65° | 76° | 2.62" | — |
| 1996 | 71° | 52° | 61° | — | — |
| 1995 | 75° | 53° | 64° | — | — |
| 1994 | 85° | 55° | 70° | — | — |
| 1993 | 70° | 53° | 61° | — | — |
| 1992 | 84° | 65° | 74° | — | — |
| 1991 | 77° | 50° | 64° | — | — |
| 1990 | 65° | 45° | 55° | — | — |
| 1989 | 77° | 47° | 62° | — | — |
| 1988warmest | 91° | 63° | 77° | — | — |
| 1987 | 75° | — | — | 3.15" | — |
| 1986 | 66° | 48° | 57° | — | — |
| 1985 | 79° | 52° | 65° | — | — |
| 1984 | 71° | 37° | 54° | — | — |
| 1983 | 74° | 46° | 60° | — | — |
| 1982 | 68° | 49° | 58° | 0.36" | — |
| 1981coldest | 53° | 45° | 49° | — | — |
| 1980 | 65° | 49° | 57° | 3.68" | — |
| 1979 | 80° | 54° | 67° | — | — |
| 1978 | 80° | 62° | 71° | 1.09" | — |
| 1977 | 82° | 56° | 69° | 0.13" | — |
| 1976 | 73° | 57° | 65° | — | — |
| 1975 | 70° | 55° | 62° | — | — |
| 1974 | 82° | 49° | 65° | — | — |
| 1973 | 60° | 50° | 55° | 2.51" | — |
| 1972 | 86° | 65° | 75° | — | — |
| 1971 | 70° | 47° | 58° | — | — |
55 years of data from LISLE - MORTON ARBORETUM