Weather on March 21
Joliet, IL
55 Years of Data
Avg High
50°F
Avg Low
31°F
Warmest
2012
73°F avg
Coldest
2013
18°F avg
About This Date
March 21st in Joliet, IL typically brings cool spring weather, with average highs around 50°F and lows near 31°F. Over 54 years of records, the warmest March 21st was in 2012 (73°F average), while the coldest was 2013 (18°F) — a 55°F range across recorded history. Rain or other precipitation has occurred on about 41% of March 21st dates historically, with the wettest March 21st recording 1.37" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Joliet, IL? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 73° | 44° | 59° | — | — |
| 2025 | 62° | 28° | 45° | — | — |
| 2024 | 40° | 26° | 33° | — | — |
| 2023 | 51° | 27° | 39° | — | — |
| 2022 | 63° | 30° | 46° | — | — |
| 2021 | 56° | 28° | 42° | — | — |
| 2020 | 47° | 27° | 37° | — | — |
| 2019 | 45° | 36° | 40° | 1.27" | — |
| 2018 | 37° | 27° | 32° | — | — |
| 2017 | 55° | 36° | 45° | — | — |
| 2016 | 45° | 24° | 34° | — | — |
| 2015 | 48° | 37° | 43° | — | — |
| 2014 | 46° | 31° | 38° | 0.03" | — |
| 2013coldest | 24° | 13° | 18° | — | — |
| 2012warmest | 84° | 63° | 73° | — | — |
| 2011 | 65° | 44° | 54° | 0.3" | — |
| 2010 | 37° | 32° | 35° | 0.46" | — |
| 2009 | 45° | 24° | 34° | — | — |
| 2008 | 51° | 29° | 40° | 0.08" | — |
| 2007 | 47° | 32° | 39° | 0.76" | — |
| 2006 | 38° | 28° | 33° | — | — |
| 2005 | 42° | 20° | 31° | — | — |
| 2004 | 63° | 29° | 46° | — | — |
| 2003 | 67° | 46° | 56° | 0.71" | — |
| 2002 | 49° | 37° | 43° | 0.03" | — |
| 2001 | 53° | 32° | 43° | — | — |
| 2000 | 58° | 43° | 50° | 0.05" | — |
| 1999 | 55° | 26° | 41° | — | — |
| 1998 | 36° | 32° | 34° | 0.08" | — |
| 1997 | 59° | 41° | 50° | — | — |
| 1996 | 34° | 25° | 29° | — | — |
| 1995 | 59° | 33° | 46° | 0.33" | — |
| 1994 | 62° | 41° | 52° | 0.33" | — |
| 1993 | 36° | 26° | 31° | — | — |
| 1992 | 43° | 27° | 35° | — | — |
| 1991 | 59° | 35° | 47° | 0.03" | — |
| 1990 | 45° | 22° | 33° | — | — |
| 1989 | 39° | 23° | 31° | 0.1" | — |
| 1988 | 42° | 23° | 33° | — | — |
| 1987 | 60° | 35° | 48° | — | — |
| 1986 | 31° | 10° | 20° | 0.05" | — |
| 1985 | 54° | 29° | 41° | — | — |
| 1984 | 39° | 31° | 35° | 0.08" | — |
| 1983 | 33° | 26° | 30° | 1.22" | — |
| 1982 | 47° | 34° | 40° | — | — |
| 1981 | 42° | 27° | 34° | — | — |
| 1980 | 59° | 31° | 45° | 0.48" | — |
| 1979 | 47° | 32° | 39° | — | — |
| 1978 | 52° | 33° | 42° | 1.37" | — |
| 1977 | 41° | 31° | 36° | 0.23" | — |
| 1976 | 68° | 31° | 49° | — | — |
| 1974 | 44° | 23° | 34° | 0.05" | — |
| 1972 | 67° | 51° | 59° | 0.3" | — |
| 1971 | 54° | 30° | 42° | — | — |
54 years of data from JOLIET