Weather on September 11
Naperville, IL
55 Years of Data
Avg High
81°F
Avg Low
55°F
Warmest
2013
83°F avg
Coldest
1993
54°F avg
About This Date
September 11th in Naperville, IL typically brings warm fall weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 55 years of records, the warmest September 11th was in 2013 (83°F average), while the coldest was 1993 (54°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 11th dates historically, with the wettest September 11th recording 1.63" of rain. The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.5°F cooler on this date compared to 20-30 years ago.
Planning for September 11th in Naperville, IL? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 53° | 68° | — | — |
| 2024 | 80° | 48° | 64° | — | — |
| 2023 | 80° | 49° | 64° | 1.12" | — |
| 2022 | 84° | 59° | 72° | — | — |
| 2021 | 80° | 55° | 68° | — | — |
| 2020 | 68° | 57° | 63° | 1.12" | — |
| 2019 | 89° | 70° | 79° | — | — |
| 2018 | 75° | 50° | 63° | — | — |
| 2017 | 72° | 40° | 56° | — | — |
| 2016 | 73° | 50° | 62° | 0.05" | — |
| 2015 | 76° | 55° | 65° | 1.42" | — |
| 2014 | 80° | 50° | 65° | 1.63" | — |
| 2013warmest | 93° | 73° | 83° | — | — |
| 2012 | 76° | 47° | 61° | — | — |
| 2011 | 78° | 53° | 66° | — | — |
| 2010 | 75° | 52° | 63° | 0.1" | — |
| 2009 | 80° | 55° | 68° | — | — |
| 2008 | 67° | 41° | 54° | — | — |
| 2007 | 75° | 49° | 62° | 0.66" | — |
| 2006 | 64° | 59° | 62° | 1.14" | — |
| 2005 | 91° | 71° | 81° | — | — |
| 2004 | 82° | 53° | 68° | — | — |
| 2003 | 83° | 62° | 72° | — | — |
| 2002 | 88° | 53° | 70° | 0.28" | — |
| 2001 | 82° | 48° | 65° | — | — |
| 2000 | 92° | 66° | 79° | 0.05" | — |
| 1999 | 84° | 44° | 64° | — | — |
| 1998 | 86° | 55° | 71° | — | — |
| 1997 | 75° | 49° | 62° | — | — |
| 1996 | 85° | 59° | 72° | — | — |
| 1995 | 77° | 43° | 60° | — | — |
| 1994 | 88° | 59° | 73° | — | — |
| 1993coldest | 70° | 39° | 54° | — | — |
| 1992 | 72° | 45° | 58° | — | — |
| 1991 | 80° | 61° | 70° | — | — |
| 1990 | 86° | 64° | 75° | — | — |
| 1989 | 76° | 55° | 65° | — | — |
| 1988 | 89° | 53° | 71° | — | — |
| 1987 | 82° | 56° | 69° | — | — |
| 1986 | 87° | 67° | 77° | 1.27" | — |
| 1985 | 70° | 56° | 63° | — | — |
| 1984 | 81° | 60° | 70° | 0.56" | — |
| 1983 | 91° | 55° | 73° | 0.56" | — |
| 1982 | 88° | 65° | 76° | — | — |
| 1981 | 85° | 63° | 74° | — | — |
| 1980 | 78° | 48° | 63° | — | — |
| 1979 | 89° | — | — | — | — |
| 1978 | 92° | 65° | 78° | — | — |
| 1977 | 78° | 44° | 61° | — | — |
| 1976 | 85° | 45° | 65° | — | — |
| 1975 | 82° | 64° | 73° | — | — |
| 1974 | 86° | 67° | 76° | — | — |
| 1973 | 77° | 58° | 67° | — | — |
| 1972 | 75° | 61° | 68° | 0.64" | — |
| 1971 | 86° | 58° | 72° | — | — |
55 years of data from WHEATON 3 SE