Weather on February 21
Naperville, IL
55 Years of Data
Avg High
42°F
Avg Low
23°F
Warmest
2017
59°F avg
Coldest
2015
10°F avg
About This Date
February 21st in Naperville, IL typically brings chilly winter weather, with average highs around 42°F and lows near 23°F. Over 56 years of records, the warmest February 21st was in 2017 (59°F average), while the coldest was 2015 (10°F) — a 49°F range across recorded history. Precipitation has occurred on 32% of recorded February 21st dates, with snow falling 9% of the time (heaviest snowfall: 4"). The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for February 21st in Naperville, IL? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 33° | 24° | 29° | — | — |
| 2025 | 23° | 1° | 12° | — | — |
| 2024 | 56° | 20° | 38° | — | — |
| 2023 | 48° | 22° | 35° | — | — |
| 2022 | 47° | 28° | 37° | — | — |
| 2021 | 29° | -2° | 13° | — | — |
| 2020 | 25° | 10° | 17° | — | — |
| 2019 | 36° | 25° | 30° | 0.15" | — |
| 2018 | 64° | 26° | 45° | 2.62" | — |
| 2017warmest | 69° | 48° | 59° | 0.1" | — |
| 2016 | 63° | 35° | 49° | — | — |
| 2015coldest | 19° | 0° | 10° | — | — |
| 2014 | 49° | 26° | 37° | 2.54" | — |
| 2013 | 24° | 7° | 15° | — | — |
| 2012 | 41° | 15° | 28° | 0.28" | 0.2" |
| 2011 | 36° | 32° | 34° | 2.54" | — |
| 2010 | 40° | 29° | 34° | — | — |
| 2009 | 29° | 13° | 21° | 0.46" | 3" |
| 2008 | 20° | 4° | 12° | — | — |
| 2007 | 48° | 21° | 35° | — | — |
| 2006 | 40° | 20° | 30° | — | — |
| 2005 | 39° | 31° | 35° | 0.51" | — |
| 2004 | 40° | 31° | 35° | 0.25" | 0.2" |
| 2003 | 50° | 21° | 36° | — | — |
| 2002 | 40° | 30° | 35° | 0.38" | — |
| 2001 | 36° | 9° | 22° | — | — |
| 2000 | 50° | 34° | 42° | — | — |
| 1999 | 37° | 20° | 28° | — | — |
| 1998 | 46° | 30° | 38° | — | — |
| 1997 | 46° | 34° | 40° | 7.24" | — |
| 1996 | 55° | 29° | 42° | — | — |
| 1995 | 57° | 23° | 40° | — | — |
| 1994 | 35° | 24° | 30° | — | — |
| 1993 | 32° | 26° | 29° | 1.5" | 4" |
| 1992 | 48° | 24° | 36° | — | — |
| 1991 | 58° | 32° | 45° | — | — |
| 1990 | 48° | 16° | 32° | — | — |
| 1989 | 35° | 22° | 28° | 0.48" | — |
| 1988 | 30° | -7° | 12° | — | — |
| 1987 | 49° | 30° | 39° | — | — |
| 1986 | 34° | 12° | 23° | 0.38" | — |
| 1985 | 42° | 38° | 40° | 0.74" | — |
| 1984 | 47° | 23° | 35° | — | — |
| 1983 | 60° | 35° | 48° | — | — |
| 1982 | 46° | 31° | 38° | — | — |
| 1981 | 51° | 30° | 41° | — | — |
| 1980 | 45° | 34° | 39° | — | — |
| 1979 | 36° | 29° | 32° | 0.86" | 0.5" |
| 1978 | 28° | 7° | 17° | — | — |
| 1977 | 36° | 7° | 21° | — | — |
| 1976 | 50° | 33° | 42° | 3.12" | — |
| 1975 | 48° | 20° | 34° | — | — |
| 1974 | 49° | 33° | 41° | 0.2" | — |
| 1973 | 35° | 22° | 28° | — | — |
| 1972 | 45° | 32° | 38° | — | — |
| 1971 | 31° | 25° | 28° | — | — |
56 years of data from LISLE - MORTON ARBORETUM