Weather on March 18
Chicago, IL
55 Years of Data
Avg High
46°F
Avg Low
32°F
Warmest
2012
66°F avg
Coldest
2023
18°F avg
About This Date
March 18th in Chicago, IL typically brings chilly spring weather, with average highs around 46°F and lows near 32°F. Over 53 years of records, the warmest March 18th was in 2012 (66°F average), while the coldest was 2023 (18°F) — a 48°F range across recorded history. Precipitation has occurred on 25% of recorded March 18th dates, with snow falling 2% of the time (heaviest snowfall: 1.5"). The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for March 18th in Chicago, IL? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 48° | 23° | 36° | — | — |
| 2025 | 71° | 41° | 56° | — | — |
| 2024 | 36° | 26° | 31° | — | — |
| 2023coldest | 24° | 13° | 18° | — | — |
| 2022 | 45° | 38° | 41° | — | — |
| 2021 | 40° | 36° | 38° | — | — |
| 2020 | 44° | 37° | 41° | — | — |
| 2019 | 45° | 28° | 37° | — | — |
| 2018 | 54° | 33° | 43° | — | — |
| 2017 | 44° | 38° | 41° | — | — |
| 2016 | 46° | 36° | 41° | — | — |
| 2015 | 46° | 34° | 40° | — | — |
| 2014 | 42° | 30° | 36° | — | — |
| 2013 | 36° | 22° | 29° | — | — |
| 2012warmest | 77° | 55° | 66° | — | — |
| 2011 | 58° | 39° | 48° | — | — |
| 2010 | 63° | 45° | 54° | — | — |
| 2009 | 60° | 42° | 51° | — | — |
| 2008 | 47° | 36° | 41° | — | — |
| 2007 | 44° | 29° | 36° | — | — |
| 2006 | 35° | 30° | 33° | — | — |
| 2005 | 50° | 32° | 41° | 0.05" | — |
| 2004 | 42° | 28° | 35° | 0.3" | — |
| 2003 | 48° | 39° | 44° | — | — |
| 2002 | 46° | 37° | 42° | — | — |
| 2001 | 46° | 24° | 35° | — | — |
| 2000 | 44° | 27° | 35° | — | — |
| 1999 | 48° | 35° | 42° | — | — |
| 1998 | 52° | 39° | 45° | — | — |
| 1994 | 39° | 36° | 37° | — | — |
| 1993 | 30° | 19° | 25° | — | — |
| 1992 | 42° | 31° | 36° | — | — |
| 1991 | 45° | 37° | 41° | 1.04" | — |
| 1990 | 48° | 32° | 40° | 0.1" | — |
| 1989 | 34° | 21° | 27° | 1.96" | — |
| 1988 | 43° | 30° | 36° | 0.18" | — |
| 1987 | 45° | 36° | 40° | 0.05" | — |
| 1986 | 57° | 38° | 47° | 0.1" | — |
| 1985 | 45° | 26° | 35° | — | — |
| 1984 | 33° | 28° | 31° | 0.46" | 1.5" |
| 1983 | 46° | 39° | 43° | 1.07" | — |
| 1982 | 44° | 32° | 38° | — | — |
| 1981 | 36° | 24° | 30° | — | — |
| 1980 | 44° | 28° | 36° | — | — |
| 1979 | — | 43° | — | 0.13" | — |
| 1978 | 36° | 21° | 28° | — | — |
| 1977 | 44° | 33° | 39° | 1.37" | — |
| 1976 | 65° | 32° | 48° | — | — |
| 1975 | 46° | 38° | 42° | — | — |
| 1974 | 50° | 32° | 41° | — | — |
| 1973 | 44° | 28° | 36° | — | — |
| 1972 | 34° | 30° | 32° | — | — |
| 1971 | 41° | 32° | 37° | 1.04" | — |
53 years of data from CHICAGO GRANT PARK