Weather on September 4
Naperville, IL
55 Years of Data
Avg High
82°F
Avg Low
56°F
Warmest
1985
79°F avg
Coldest
1974
55°F avg
About This Date
September 4th in Naperville, IL typically brings warm fall weather, with average highs around 82°F and lows near 56°F — a 26°F daily swing. Over 55 years of records, the warmest September 4th was in 1985 (79°F average), while the coldest was 1974 (55°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 4th dates historically, with the wettest September 4th recording 1.83" 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 September 4th in Naperville, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 45° | 58° | 0.51" | — |
| 2024 | 76° | 47° | 61° | — | — |
| 2023 | 90° | 65° | 77° | — | — |
| 2022 | 88° | 66° | 77° | 0.94" | — |
| 2021 | 73° | 61° | 67° | 0.15" | — |
| 2020 | 86° | 48° | 67° | — | — |
| 2019 | 81° | 57° | 69° | 0.13" | — |
| 2018 | 89° | 68° | 79° | 1.83" | — |
| 2017 | 82° | 50° | 66° | — | — |
| 2016 | 78° | 52° | 65° | — | — |
| 2015 | 90° | 65° | 77° | 0.03" | — |
| 2014 | 84° | 58° | 71° | — | — |
| 2013 | 76° | 52° | 64° | — | — |
| 2012 | 88° | 68° | 78° | — | — |
| 2011 | 88° | 63° | 75° | 0.61" | — |
| 2010 | 72° | 50° | 61° | 0.05" | — |
| 2009 | 77° | 40° | 58° | — | — |
| 2008 | 69° | 56° | 62° | 0.25" | — |
| 2007 | 88° | 59° | 73° | — | — |
| 2006 | 77° | 60° | 69° | — | — |
| 2005 | 84° | 53° | 69° | — | — |
| 2004 | 86° | 60° | 73° | — | — |
| 2003 | 82° | 55° | 69° | — | — |
| 2002 | 85° | 53° | 69° | — | — |
| 2001 | 89° | 59° | 74° | 0.03" | — |
| 2000 | 85° | 63° | 74° | — | — |
| 1999 | 95° | 61° | 78° | — | — |
| 1998 | 86° | 57° | 72° | 0.03" | — |
| 1997 | 76° | 42° | 59° | — | — |
| 1996 | 88° | 61° | 74° | — | — |
| 1995 | 89° | 57° | 73° | — | — |
| 1994 | 66° | 53° | 60° | — | — |
| 1993 | 77° | 52° | 64° | — | — |
| 1992 | 82° | 50° | 66° | — | — |
| 1991 | 80° | 59° | 70° | 1.65" | — |
| 1990 | 92° | 65° | 78° | — | — |
| 1989 | 79° | 50° | 64° | — | — |
| 1988 | 81° | 59° | 70° | 0.86" | — |
| 1987 | 84° | 51° | 68° | — | — |
| 1986 | 83° | 65° | 74° | — | — |
| 1985warmest | 86° | 71° | 79° | — | — |
| 1984 | 75° | — | — | — | — |
| 1983 | 92° | 58° | 75° | — | — |
| 1982 | 79° | 44° | 61° | — | — |
| 1981 | 77° | 57° | 67° | 0.1" | — |
| 1980 | 82° | 65° | 73° | — | — |
| 1979 | 80° | 53° | 67° | — | — |
| 1978 | 86° | 48° | 67° | — | — |
| 1977 | 85° | 62° | 73° | — | — |
| 1976 | 85° | 55° | 70° | — | — |
| 1975 | 83° | 55° | 69° | — | — |
| 1974coldest | 68° | 41° | 55° | — | — |
| 1973 | 80° | 68° | 74° | 0.33" | — |
| 1972 | 74° | 43° | 58° | — | — |
| 1971 | 88° | 69° | 78° | 1.22" | — |
55 years of data from LISLE - MORTON ARBORETUM