Weather on February 18
Naperville, IL
55 Years of Data
Avg High
38°F
Avg Low
19°F
Warmest
1981
50°F avg
Coldest
2025
2°F avg
About This Date
February 18th in Naperville, IL typically brings cold winter weather, with average highs around 38°F and lows near 19°F. Over 56 years of records, the warmest February 18th was in 1981 (50°F average), while the coldest was 2025 (2°F) — a 48°F range across recorded history. Precipitation has occurred on 32% of recorded February 18th dates, with snow falling 16% of the time (heaviest snowfall: 4.8"). The last decade has been 5.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.5°F cooler on this date compared to 20-30 years ago.
Planning for February 18th in Naperville, IL? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Cooling Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 57° | 33° | 45° | 0.15" | — |
| 2025coldest | 10° | -7° | 2° | — | — |
| 2024 | 32° | 16° | 24° | — | — |
| 2023 | 29° | 16° | 22° | — | — |
| 2022 | 30° | -2° | 14° | 0.48" | 3.1" |
| 2021 | 23° | -2° | 11° | 0.05" | 0.8" |
| 2020 | 41° | 33° | 37° | 0.36" | — |
| 2019 | 28° | 10° | 19° | 0.58" | 3.6" |
| 2018 | 35° | 11° | 23° | — | — |
| 2017 | 66° | 29° | 47° | — | — |
| 2016 | 36° | 18° | 27° | — | — |
| 2015 | 23° | 3° | 13° | — | — |
| 2014 | 29° | 14° | 21° | 1.02" | 4.8" |
| 2013 | 30° | 3° | 17° | — | — |
| 2012 | 50° | 24° | 37° | — | — |
| 2011 | 57° | 36° | 46° | — | — |
| 2010 | 33° | 28° | 31° | — | — |
| 2009 | 43° | 28° | 35° | 0.79" | — |
| 2008 | 50° | 21° | 36° | 1.78" | — |
| 2007 | 25° | 11° | 18° | — | — |
| 2006 | 23° | -8° | 8° | — | — |
| 2005 | 28° | 9° | 18° | — | — |
| 2004 | 42° | 11° | 26° | — | — |
| 2003 | 37° | 24° | 31° | — | — |
| 2002 | 54° | 36° | 45° | — | — |
| 2001 | 30° | 6° | 18° | — | — |
| 2000 | 37° | 28° | 33° | 0.41" | 1.5" |
| 1999 | 41° | 16° | 28° | — | — |
| 1998 | 41° | 37° | 39° | 0.15" | — |
| 1997 | 55° | 40° | 47° | — | — |
| 1996 | 29° | 3° | 16° | — | — |
| 1995 | 57° | 27° | 42° | — | — |
| 1994 | 59° | 37° | 48° | — | — |
| 1993 | 19° | -1° | 9° | — | — |
| 1992 | 46° | 35° | 41° | 0.64" | — |
| 1991 | 42° | 13° | 27° | — | — |
| 1990 | 43° | 21° | 32° | — | — |
| 1989 | 28° | 17° | 23° | 0.15" | — |
| 1988 | 44° | 15° | 30° | — | — |
| 1987 | 44° | 15° | 30° | — | — |
| 1986 | 38° | 32° | 35° | — | — |
| 1985 | 39° | 12° | 26° | — | — |
| 1984 | 42° | 35° | 39° | — | — |
| 1983 | 39° | 33° | 36° | — | — |
| 1982 | 34° | 30° | 32° | 0.25" | 1" |
| 1981warmest | 58° | 43° | 50° | — | — |
| 1980 | 34° | 0° | 17° | — | — |
| 1979 | 15° | 4° | 9° | 0.05" | 0.8" |
| 1978 | 25° | -11° | 7° | — | — |
| 1977 | 44° | 28° | 36° | — | 0.1" |
| 1976 | 49° | 35° | 42° | 0.43" | — |
| 1975 | 34° | 30° | 32° | 0.18" | 0.7" |
| 1974 | 49° | 27° | 38° | 0.38" | — |
| 1973 | 31° | 19° | 25° | — | — |
| 1972 | 34° | 20° | 27° | — | — |
| 1971 | 48° | 32° | 40° | 0.25" | — |
56 years of data from WHEATON 3 SE