Weather on October 17
Naperville, IL
55 Years of Data
Avg High
63°F
Avg Low
40°F
Warmest
1998
72°F avg
Coldest
1992
39°F avg
About This Date
October 17th in Naperville, IL typically brings mild fall weather, with average highs around 63°F and lows near 40°F. Over 55 years of records, the warmest October 17th was in 1998 (72°F average), while the coldest was 1992 (39°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 25% of October 17th dates historically, with the wettest October 17th recording 2.49" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for October 17th in Naperville, IL? Great weather for outdoor activities.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 54° | 62° | — | — |
| 2024 | 58° | 29° | 43° | — | — |
| 2023 | 52° | 30° | 41° | — | — |
| 2022 | 56° | 34° | 45° | — | — |
| 2021 | 60° | 35° | 48° | — | — |
| 2020 | 56° | 29° | 42° | — | — |
| 2019 | 53° | 37° | 45° | — | — |
| 2018 | 58° | 33° | 45° | — | — |
| 2017 | 64° | 39° | 52° | — | — |
| 2016 | 73° | 59° | 66° | 0.76" | — |
| 2015 | 56° | 31° | 43° | — | — |
| 2014 | 57° | 48° | 53° | 0.05" | — |
| 2013 | 53° | 48° | 51° | 0.18" | — |
| 2012 | 69° | 39° | 54° | — | — |
| 2011 | 61° | 38° | 49° | 0.28" | — |
| 2010 | 71° | 39° | 55° | — | — |
| 2009 | 52° | 34° | 43° | — | — |
| 2008 | 59° | 36° | 47° | 0.03" | — |
| 2007 | 68° | 43° | 55° | — | — |
| 2006 | 58° | 49° | 53° | 2.49" | — |
| 2005 | 75° | 38° | 56° | — | — |
| 2004 | 56° | 30° | 43° | — | — |
| 2003 | 58° | 32° | 45° | — | — |
| 2002 | 51° | 30° | 41° | — | — |
| 2001 | 56° | 31° | 43° | — | — |
| 2000 | 67° | 39° | 53° | — | — |
| 1999 | 62° | 42° | 52° | — | — |
| 1998warmest | 81° | 63° | 72° | 1.3" | — |
| 1997 | 55° | 32° | 44° | — | — |
| 1996 | 72° | 58° | 65° | 0.81" | — |
| 1995 | 75° | 35° | 55° | — | — |
| 1994 | 79° | 55° | 67° | — | — |
| 1993 | 63° | 48° | 55° | 1.73" | — |
| 1992coldest | 51° | 26° | 39° | — | — |
| 1991 | 75° | 45° | 60° | — | — |
| 1990 | 78° | 63° | 70° | — | — |
| 1989 | 51° | 43° | 47° | 0.25" | — |
| 1988 | 65° | 44° | 54° | 0.08" | — |
| 1987 | 70° | 46° | 58° | — | — |
| 1986 | 60° | 45° | 52° | — | — |
| 1985 | 74° | 40° | 57° | — | — |
| 1984 | — | 40° | — | 0.36" | — |
| 1983 | 67° | 35° | 51° | — | — |
| 1982 | 59° | 30° | 45° | — | — |
| 1981 | 62° | 39° | 51° | — | — |
| 1980 | 70° | 61° | 65° | 2.44" | — |
| 1979 | 61° | 49° | 55° | — | — |
| 1978 | 57° | 30° | 44° | 0.25" | — |
| 1977 | 63° | 29° | 46° | — | — |
| 1976 | 51° | 29° | 40° | — | — |
| 1975 | 60° | 40° | 50° | — | — |
| 1974 | 66° | 41° | 54° | — | — |
| 1973 | 56° | 30° | 43° | — | — |
| 1972 | 67° | 31° | 49° | — | — |
| 1971 | 76° | 46° | 61° | — | — |
55 years of data from LISLE - MORTON ARBORETUM