Weather on September 30
Naperville, IL
55 Years of Data
About This Date
September 30th in Naperville, IL typically brings pleasant fall weather, with average highs around 74°F and lows near 47°F — a 27°F daily swing. Over 55 years of records, the warmest September 30th was in 1971 (76°F average), while the coldest was 1972 (45°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 30th dates historically, with the wettest September 30th recording 5.03" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 30th in Naperville, IL? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 54° | 71° | — | — |
| 2024 | 73° | 56° | 64° | 0.03" | — |
| 2023 | 73° | 49° | 61° | — | — |
| 2022 | 63° | 37° | 50° | — | — |
| 2021 | 84° | 56° | 70° | — | — |
| 2020 | 60° | 45° | 52° | — | — |
| 2019 | 67° | 60° | 63° | 0.3" | — |
| 2018 | 58° | 35° | 46° | 0.1" | — |
| 2017 | 70° | 42° | 56° | — | — |
| 2016 | 64° | 59° | 62° | 0.94" | — |
| 2015 | 63° | 48° | 55° | — | — |
| 2014 | 82° | 48° | 65° | — | — |
| 2013 | 68° | 41° | 55° | — | — |
| 2012 | 79° | 41° | 60° | — | — |
| 2011 | 67° | 48° | 57° | 0.36" | — |
| 2010 | 77° | 49° | 63° | — | — |
| 2009 | 63° | 42° | 52° | — | — |
| 2008 | 63° | 49° | 56° | 1.3" | — |
| 2007 | 81° | 47° | 64° | — | — |
| 2006 | 69° | 28° | 49° | 0.2" | — |
| 2005 | 71° | 38° | 54° | — | — |
| 2004 | 72° | 34° | 53° | — | — |
| 2003 | 60° | 39° | 50° | — | — |
| 2002 | 86° | 66° | 76° | — | — |
| 2001 | 76° | 41° | 58° | — | — |
| 2000 | 80° | 49° | 64° | — | — |
| 1999 | 72° | 37° | 54° | — | — |
| 1998 | 78° | 51° | 65° | 0.36" | — |
| 1997 | 76° | 55° | 65° | — | — |
| 1996 | 80° | 46° | 63° | — | — |
| 1995 | 86° | 51° | 69° | — | — |
| 1994 | 85° | 49° | 67° | — | — |
| 1993 | 64° | 30° | 47° | — | — |
| 1992 | 70° | 38° | 54° | — | — |
| 1991 | 82° | 55° | 69° | — | — |
| 1990 | 70° | 42° | 56° | — | — |
| 1989 | 80° | 41° | 61° | — | — |
| 1988 | 80° | 57° | 69° | — | — |
| 1987 | 69° | 48° | 59° | — | — |
| 1986 | 71° | 64° | 68° | 5.03" | — |
| 1985 | 70° | 37° | 53° | 0.46" | — |
| 1984 | 62° | 30° | 46° | — | — |
| 1983 | 82° | 49° | 65° | — | — |
| 1982 | 86° | 53° | 70° | — | — |
| 1981 | 85° | 54° | 69° | — | — |
| 1980 | 80° | 47° | 63° | — | — |
| 1979 | 83° | 58° | 70° | — | — |
| 1978 | 73° | 58° | 65° | — | — |
| 1977 | 73° | 52° | 62° | — | — |
| 1976 | 75° | 42° | 59° | — | — |
| 1975 | 74° | 45° | 59° | — | — |
| 1974 | 65° | 40° | 52° | — | — |
| 1973 | 69° | 55° | 62° | — | — |
| 1972coldest | 56° | 35° | 45° | — | — |
| 1971warmest | 91° | 60° | 76° | — | — |
Naperville, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Naperville, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Naperville, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Naperville, IL
Naperville, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.