Weather on September 26
Naperville, IL
55 Years of Data
Avg High
75°F
Avg Low
50°F
Warmest
1998
81°F avg
Coldest
1984
46°F avg
About This Date
September 26th in Naperville, IL typically brings pleasant fall weather, with average highs around 75°F and lows near 50°F — a 25°F daily swing. Over 55 years of records, the warmest September 26th was in 1998 (81°F average), while the coldest was 1984 (46°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 26th dates historically, with the wettest September 26th recording 2.49" of rain. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for September 26th in Naperville, IL? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 52° | 64° | — | — |
| 2024 | 76° | 47° | 61° | 0.03" | — |
| 2023 | 73° | 60° | 67° | 0.66" | — |
| 2022 | 66° | 45° | 55° | 0.28" | — |
| 2021 | 70° | 48° | 59° | — | — |
| 2020 | 79° | 51° | 65° | — | — |
| 2019 | 80° | 54° | 67° | — | — |
| 2018 | 84° | 48° | 66° | 0.51" | — |
| 2017 | 93° | 61° | 77° | — | — |
| 2016 | 85° | 58° | 71° | 0.05" | — |
| 2015 | 76° | 51° | 63° | — | — |
| 2014 | 75° | 48° | 62° | — | — |
| 2013 | 72° | 44° | 58° | — | — |
| 2012 | 77° | 54° | 65° | — | — |
| 2011 | 64° | 52° | 58° | 2.49" | — |
| 2010 | 61° | 50° | 55° | — | — |
| 2009 | 70° | 51° | 60° | — | — |
| 2008 | 82° | 44° | 63° | — | — |
| 2007 | 85° | 52° | 68° | 1.3" | — |
| 2006 | 73° | 42° | 58° | — | — |
| 2005 | 73° | 64° | 69° | — | — |
| 2004 | 74° | 43° | 58° | — | — |
| 2003 | 64° | 42° | 53° | — | — |
| 2002 | 78° | 44° | 61° | — | — |
| 2001 | 71° | 43° | 57° | — | — |
| 2000 | 72° | 36° | 54° | — | — |
| 1999 | 88° | 58° | 73° | — | — |
| 1998warmest | 92° | 70° | 81° | 0.05" | — |
| 1997 | 81° | 47° | 64° | — | — |
| 1996 | 65° | 52° | 58° | — | — |
| 1995 | 77° | 42° | 60° | — | — |
| 1994 | 60° | 52° | 56° | 1.91" | — |
| 1993 | 67° | 52° | 59° | 2.06" | — |
| 1992 | 76° | 61° | 68° | 0.51" | — |
| 1991 | 67° | 42° | 54° | — | — |
| 1990 | 82° | 49° | 65° | — | — |
| 1989 | 70° | 43° | 56° | — | — |
| 1988 | 82° | 47° | 64° | — | — |
| 1987 | 84° | 43° | 63° | — | — |
| 1986 | 88° | 68° | 78° | — | — |
| 1985 | 60° | 47° | 53° | 0.15" | — |
| 1984coldest | 56° | 36° | 46° | — | — |
| 1983 | 76° | 55° | 65° | — | — |
| 1982 | 68° | 50° | 59° | — | — |
| 1981 | 72° | 61° | 66° | 1.24" | — |
| 1980 | 64° | 40° | 52° | 0.28" | — |
| 1979 | 83° | 48° | 65° | — | — |
| 1978 | 78° | 41° | 60° | — | — |
| 1977 | 78° | 53° | 66° | 1.4" | — |
| 1976 | 64° | 48° | 56° | — | — |
| 1975 | 67° | 41° | 54° | — | — |
| 1974 | 83° | 42° | 62° | — | — |
| 1973 | 84° | 67° | 75° | — | — |
| 1972 | 75° | 65° | 70° | — | — |
| 1971 | 74° | 51° | 62° | — | — |
55 years of data from WHEATON 3 SE