Weather on September 29
Naperville, IL
55 Years of Data
Avg High
72°F
Avg Low
48°F
Warmest
1986
75°F avg
Coldest
1984
46°F avg
About This Date
September 29th in Naperville, IL typically brings pleasant fall weather, with average highs around 72°F and lows near 48°F. Over 55 years of records, the warmest September 29th was in 1986 (75°F average), while the coldest was 1984 (46°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 29th dates historically, with the wettest September 29th recording 6.68" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for September 29th 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 | 82° | 54° | 68° | — | — |
| 2024 | 72° | 65° | 68° | 0.23" | — |
| 2023 | 70° | 49° | 59° | — | — |
| 2022 | 61° | 36° | 48° | — | — |
| 2021 | 77° | 50° | 64° | — | — |
| 2020 | 63° | 42° | 52° | 0.1" | — |
| 2019 | 62° | 55° | 59° | 1.47" | — |
| 2018 | 60° | 35° | 48° | 0.2" | — |
| 2017 | 73° | 45° | 59° | — | — |
| 2016 | 61° | 50° | 55° | 1.8" | — |
| 2015 | 76° | 60° | 68° | — | — |
| 2014 | 79° | 49° | 64° | — | — |
| 2013 | 83° | 46° | 64° | 1.07" | — |
| 2012 | 68° | 41° | 55° | — | — |
| 2011 | 66° | 47° | 56° | 0.18" | — |
| 2010 | 72° | 47° | 59° | — | — |
| 2009 | 59° | 47° | 53° | — | — |
| 2008 | 80° | 51° | 66° | — | — |
| 2007 | 74° | 44° | 59° | — | — |
| 2006 | 60° | 36° | 48° | — | — |
| 2005 | 70° | 41° | 55° | — | — |
| 2004 | 68° | 43° | 55° | — | — |
| 2003 | 62° | 36° | 49° | — | — |
| 2002 | 86° | 56° | 71° | 0.28" | — |
| 2001 | 72° | 43° | 57° | — | — |
| 2000 | 77° | 44° | 61° | — | — |
| 1999 | 67° | 48° | 57° | 2.03" | — |
| 1998 | 81° | 51° | 66° | — | — |
| 1997 | 77° | 52° | 64° | — | — |
| 1996 | 67° | 46° | 56° | — | — |
| 1995 | 83° | 52° | 67° | — | — |
| 1994 | 71° | 41° | 56° | — | — |
| 1993 | 59° | 39° | 49° | — | — |
| 1992 | 65° | 33° | 49° | — | — |
| 1991 | 67° | 55° | 61° | — | — |
| 1990 | 72° | 54° | 63° | — | — |
| 1989 | 75° | 45° | 60° | — | — |
| 1988 | 82° | 55° | 69° | — | — |
| 1987 | 78° | 58° | 68° | — | — |
| 1986warmest | 84° | 66° | 75° | — | — |
| 1985 | 76° | 48° | 62° | — | — |
| 1984coldest | 59° | 32° | 46° | — | — |
| 1983 | 82° | 49° | 65° | — | — |
| 1982 | 84° | 60° | 72° | — | — |
| 1981 | 65° | 42° | 53° | 1.45" | — |
| 1980 | 79° | 46° | 62° | — | — |
| 1979 | 83° | 54° | 68° | — | — |
| 1978 | 74° | 41° | 57° | — | — |
| 1977 | 75° | 45° | 60° | — | — |
| 1976 | 69° | 41° | 55° | — | — |
| 1975 | 72° | 44° | 58° | 0.53" | — |
| 1974 | 64° | 45° | 54° | 1.52" | — |
| 1973 | 74° | 56° | 65° | 0.86" | — |
| 1972 | 76° | 48° | 62° | 6.68" | — |
| 1971 | 85° | 62° | 73° | — | — |
55 years of data from WHEATON 3 SE