Weather on October 27
Naperville, IL
55 Years of Data
Avg High
59°F
Avg Low
38°F
Warmest
2000
66°F avg
Coldest
1980
34°F avg
About This Date
October 27th in Naperville, IL typically brings cool fall weather, with average highs around 59°F and lows near 38°F. Over 55 years of records, the warmest October 27th was in 2000 (66°F average), while the coldest was 1980 (34°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 35% of October 27th dates historically, with the wettest October 27th recording 5.38" of rain. The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
Planning for October 27th in Naperville, IL? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 41° | 51° | — | — |
| 2024 | 57° | 32° | 45° | — | — |
| 2023 | 69° | 57° | 63° | 0.41" | — |
| 2022 | 54° | 29° | 41° | — | — |
| 2021 | 57° | 31° | 44° | — | — |
| 2020 | 37° | 32° | 35° | 0.38" | — |
| 2019 | 47° | 32° | 39° | 5.13" | — |
| 2018 | 62° | 38° | 50° | — | — |
| 2017 | 60° | 34° | 47° | — | — |
| 2016 | 49° | 44° | 46° | 1.75" | — |
| 2015 | 62° | 34° | 48° | — | — |
| 2014 | 66° | 34° | 50° | — | — |
| 2013 | 53° | 27° | 40° | — | — |
| 2012 | 50° | 30° | 40° | — | — |
| 2011 | 49° | 43° | 46° | 0.05" | — |
| 2010 | 65° | 40° | 52° | — | — |
| 2009 | 49° | 39° | 44° | 0.38" | — |
| 2008 | 56° | 36° | 46° | 0.03" | — |
| 2007 | 66° | 50° | 58° | 0.89" | — |
| 2006 | 45° | 42° | 43° | 1.27" | — |
| 2005 | 55° | 34° | 44° | — | — |
| 2004 | 66° | 53° | 60° | 0.08" | — |
| 2003 | 44° | 32° | 38° | — | — |
| 2002 | 47° | 30° | 38° | — | — |
| 2001 | 49° | 37° | 43° | 0.05" | — |
| 2000warmest | 77° | 55° | 66° | — | — |
| 1999 | 68° | 32° | 50° | — | — |
| 1998 | 75° | 51° | 63° | — | — |
| 1997 | 45° | 30° | 37° | 2.62" | — |
| 1996 | 71° | 45° | 58° | — | — |
| 1995 | 64° | 50° | 57° | 1.24" | — |
| 1994 | 60° | 28° | 44° | — | — |
| 1993 | 57° | 41° | 49° | — | — |
| 1992 | 62° | 30° | 46° | — | — |
| 1991 | 54° | 46° | 50° | 5.38" | — |
| 1990 | 62° | 44° | 53° | — | — |
| 1989 | 76° | 43° | 59° | — | — |
| 1988 | 57° | 28° | 43° | — | — |
| 1987 | 55° | 35° | 45° | 0.51" | — |
| 1986 | 63° | 48° | 55° | — | — |
| 1985 | 66° | 50° | 58° | — | — |
| 1984 | — | 61° | — | — | — |
| 1983 | 65° | 30° | 47° | — | — |
| 1982 | 65° | 29° | 47° | — | — |
| 1981 | 63° | 42° | 52° | — | — |
| 1980coldest | 41° | 27° | 34° | — | — |
| 1979 | 67° | 38° | 52° | — | — |
| 1978 | 63° | 37° | 50° | — | — |
| 1977 | 66° | 38° | 52° | 0.03" | — |
| 1976 | 43° | 30° | 36° | 0.03" | — |
| 1975 | 68° | 40° | 54° | — | — |
| 1974 | 72° | 30° | 51° | — | — |
| 1973 | 54° | 34° | 44° | 0.66" | — |
| 1972 | 58° | 33° | 45° | 0.08" | — |
| 1971 | 75° | 56° | 65° | — | — |
55 years of data from LISLE - MORTON ARBORETUM