Weather on November 21
Naperville, IL
55 Years of Data
Avg High
47°F
Avg Low
29°F
Warmest
1990
59°F avg
Coldest
2014
17°F avg
About This Date
November 21st in Naperville, IL typically brings chilly fall weather, with average highs around 47°F and lows near 29°F. Over 55 years of records, the warmest November 21st was in 1990 (59°F average), while the coldest was 2014 (17°F) — a 42°F range across recorded history. Precipitation has occurred on 31% of recorded November 21st dates, with snow falling 11% of the time (heaviest snowfall: 2"). The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for November 21st in Naperville, IL? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 36° | 42° | — | — |
| 2024 | 47° | 26° | 36° | 0.23" | 0.2" |
| 2023 | 47° | 38° | 42° | 1.68" | — |
| 2022 | 32° | 13° | 22° | — | — |
| 2021 | 50° | — | — | — | — |
| 2020 | 63° | 33° | 48° | — | — |
| 2019 | 48° | 35° | 42° | 1.47" | — |
| 2018 | 36° | 28° | 32° | — | — |
| 2017 | 53° | 33° | 43° | — | — |
| 2016 | 36° | 17° | 26° | — | — |
| 2015 | 42° | 32° | 37° | — | 0.5" |
| 2014coldest | 28° | 5° | 17° | — | — |
| 2013 | 44° | 31° | 37° | 0.43" | — |
| 2012 | 58° | 33° | 45° | — | — |
| 2011 | 43° | 38° | 40° | — | — |
| 2010 | 46° | 25° | 35° | — | — |
| 2009 | 51° | 27° | 39° | — | — |
| 2008 | 32° | 16° | 24° | — | — |
| 2007 | 49° | 43° | 46° | 2.21" | — |
| 2006 | 50° | 24° | 37° | — | — |
| 2005 | 49° | 35° | 42° | — | — |
| 2004 | 48° | 29° | 38° | — | — |
| 2003 | 64° | 41° | 53° | — | — |
| 2002 | 49° | 33° | 41° | — | — |
| 2001 | 57° | 35° | 46° | — | — |
| 2000 | 28° | 13° | 20° | — | — |
| 1999 | 53° | 29° | 41° | — | — |
| 1998 | 44° | 19° | 32° | — | — |
| 1997 | 44° | 34° | 39° | — | — |
| 1996 | 38° | 30° | 34° | 0.56" | 2" |
| 1995 | 52° | 28° | 40° | — | — |
| 1994 | 60° | 42° | 51° | 0.61" | — |
| 1993 | 52° | 33° | 42° | — | — |
| 1992 | 63° | 42° | 52° | 0.97" | — |
| 1991 | 49° | 25° | 37° | 0.03" | — |
| 1990warmest | 64° | 53° | 59° | 0.51" | — |
| 1989 | 52° | 27° | 39° | — | — |
| 1988 | 37° | 29° | 33° | — | — |
| 1987 | — | 13° | — | — | — |
| 1986 | 36° | 29° | 32° | — | — |
| 1985 | 30° | 12° | 21° | 0.08" | — |
| 1984 | 40° | 13° | 26° | — | — |
| 1983 | 55° | 35° | 45° | 0.15" | — |
| 1982 | 63° | 39° | 51° | — | — |
| 1981 | 31° | 24° | 27° | 0.15" | 0.4" |
| 1980 | 47° | 28° | 37° | — | — |
| 1979 | 58° | 43° | 50° | 3.25" | — |
| 1978 | 29° | 26° | 27° | 0.1" | 0.3" |
| 1977 | 57° | 23° | 40° | — | — |
| 1976 | 41° | 26° | 34° | — | — |
| 1975 | 45° | 31° | 38° | 0.3" | 1" |
| 1974 | 37° | 29° | 33° | — | — |
| 1973 | 59° | 39° | 49° | 0.69" | — |
| 1972 | 40° | 32° | 36° | — | — |
| 1971 | 44° | 26° | 35° | — | — |
55 years of data from LISLE - MORTON ARBORETUM