Weather on March 18
Naperville, IL
55 Years of Data
Avg High
50°F
Avg Low
28°F
Warmest
2012
69°F avg
Coldest
2023
21°F avg
About This Date
March 18th in Naperville, IL typically brings cool spring weather, with average highs around 50°F and lows near 28°F. Over 56 years of records, the warmest March 18th was in 2012 (69°F average), while the coldest was 2023 (21°F) — a 48°F range across recorded history. Precipitation has occurred on 25% of recorded March 18th dates, with snow falling 9% of the time (heaviest snowfall: 4.4"). The last decade has been 5.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.3°F cooler on this date compared to 20-30 years ago.
Planning for March 18th in Naperville, IL? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 29° | 13° | 21° | 0.05" | 0.5" |
| 2025 | 52° | 19° | 35° | — | — |
| 2024 | 41° | 22° | 31° | — | — |
| 2023coldest | 33° | 9° | 21° | — | — |
| 2022 | 73° | 40° | 56° | — | — |
| 2021 | 38° | 32° | 35° | 1.4" | — |
| 2020 | 48° | 32° | 40° | — | — |
| 2019 | 45° | 23° | 34° | — | — |
| 2018 | 45° | 21° | 33° | — | — |
| 2017 | 50° | 34° | 42° | — | — |
| 2016 | 57° | 32° | 45° | — | — |
| 2015 | 47° | 22° | 34° | — | — |
| 2014 | 40° | 16° | 28° | — | — |
| 2013 | 37° | 25° | 31° | 0.08" | — |
| 2012warmest | 81° | 58° | 69° | — | — |
| 2011 | 67° | 39° | 53° | — | — |
| 2010 | 65° | 26° | 45° | — | — |
| 2009 | 74° | 48° | 61° | — | — |
| 2008 | 49° | 33° | 41° | — | — |
| 2007 | 46° | 23° | 35° | — | — |
| 2006 | 43° | 18° | 30° | — | — |
| 2005 | 50° | 31° | 40° | — | — |
| 2004 | 41° | 23° | 32° | 0.15" | 0.2" |
| 2003 | 74° | 40° | 57° | — | — |
| 2002 | 53° | 35° | 44° | — | — |
| 2001 | 50° | 18° | 34° | — | — |
| 2000 | 47° | 24° | 35° | — | — |
| 1999 | 60° | 33° | 47° | — | — |
| 1998 | 54° | 37° | 45° | 2.46" | — |
| 1997 | 49° | 32° | 40° | — | — |
| 1996 | 50° | 22° | 36° | 0.08" | — |
| 1995 | 69° | 35° | 52° | — | — |
| 1994 | 39° | 31° | 35° | — | — |
| 1993 | 36° | 10° | 23° | — | — |
| 1992 | 41° | 30° | 36° | — | — |
| 1991 | 49° | 35° | 42° | 1.3" | — |
| 1990 | 44° | 30° | 37° | — | — |
| 1989 | 28° | 16° | 22° | 0.79" | — |
| 1988 | 43° | 27° | 35° | — | — |
| 1987 | 50° | 36° | 43° | — | — |
| 1986 | 60° | 40° | 50° | 0.05" | — |
| 1985 | 48° | 14° | 31° | — | — |
| 1984 | 33° | 30° | 32° | 0.69" | 4.4" |
| 1983 | 48° | 40° | 44° | 1.12" | — |
| 1982 | 51° | 30° | 41° | — | — |
| 1981 | 36° | 15° | 25° | — | — |
| 1980 | 51° | 20° | 35° | — | — |
| 1979 | 67° | 36° | 51° | — | — |
| 1978 | 40° | 15° | 27° | — | — |
| 1977 | 43° | 32° | 37° | 1.42" | 0.6" |
| 1976 | 68° | 30° | 49° | — | — |
| 1975 | 60° | 40° | 50° | — | — |
| 1974 | 51° | 29° | 40° | — | — |
| 1973 | 45° | 24° | 34° | — | — |
| 1972 | 48° | 29° | 38° | 0.08" | — |
| 1971 | 41° | 26° | 34° | 0.58" | 3.5" |
56 years of data from LISLE - MORTON ARBORETUM