Weather on March 21
Norwalk, CA
55 Years of Data
Avg High
70°F
Avg Low
52°F
Warmest
2026
72°F avg
Coldest
1987
50°F avg
About This Date
March 21st in Norwalk, CA typically brings pleasant spring weather, with average highs around 70°F and lows near 52°F. Over 56 years of records, the warmest March 21st was in 2026 (72°F average), while the coldest was 1987 (50°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 25% of March 21st dates historically, with the wettest March 21st recording 4.22" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 21st in Norwalk, CA? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 83° | 61° | 72° | — | — |
| 2025 | 76° | 53° | 64° | — | — |
| 2024 | 71° | 57° | 64° | — | — |
| 2023 | 65° | 51° | 58° | 4.22" | — |
| 2022 | 77° | 52° | 64° | — | — |
| 2021 | 70° | 49° | 59° | — | — |
| 2020 | 70° | 53° | 61° | — | — |
| 2019 | 61° | 50° | 55° | 0.18" | — |
| 2018 | 70° | 55° | 62° | 0.15" | — |
| 2017 | 67° | 54° | 60° | 0.41" | — |
| 2016 | 72° | 58° | 65° | — | — |
| 2015 | 76° | 61° | 68° | — | — |
| 2014 | 69° | 55° | 62° | — | — |
| 2013 | 73° | 55° | 64° | — | — |
| 2012 | 80° | 48° | 64° | — | — |
| 2011 | 59° | 46° | 53° | 0.79" | — |
| 2010 | 79° | 52° | 65° | — | — |
| 2009 | 63° | 55° | 59° | — | — |
| 2008 | 83° | 49° | 66° | — | — |
| 2007 | 66° | 52° | 59° | 0.03" | — |
| 2006 | 63° | 46° | 54° | — | — |
| 2005 | 69° | 49° | 59° | 0.03" | — |
| 2004 | 73° | 57° | 65° | — | — |
| 2003 | 73° | 49° | 61° | — | — |
| 2002 | 79° | 49° | 64° | — | — |
| 2001 | 70° | 57° | 63° | — | — |
| 2000 | 71° | 52° | 61° | — | — |
| 1999 | 67° | 46° | 56° | — | — |
| 1998 | 70° | 57° | 63° | — | — |
| 1997 | 73° | 49° | 61° | — | — |
| 1996 | 66° | 56° | 61° | — | — |
| 1995 | 63° | 50° | 56° | 0.64" | — |
| 1994 | 72° | 52° | 62° | — | — |
| 1993 | 69° | 59° | 64° | — | — |
| 1992 | 64° | 51° | 58° | 0.79" | — |
| 1991 | 61° | 44° | 52° | — | — |
| 1990 | 80° | 53° | 67° | — | — |
| 1989 | 84° | 54° | 69° | — | — |
| 1988 | 73° | 52° | 62° | — | — |
| 1987coldest | 56° | 45° | 50° | 0.84" | — |
| 1986 | 88° | 52° | 70° | — | — |
| 1985 | 64° | 54° | 59° | — | — |
| 1984 | 69° | 57° | 63° | — | — |
| 1983 | 62° | 51° | 57° | 2.08" | — |
| 1982 | 71° | 43° | 57° | — | — |
| 1981 | 64° | 49° | 56° | — | — |
| 1980 | 64° | 48° | 56° | 0.2" | — |
| 1979 | 62° | 51° | 57° | — | — |
| 1978 | 71° | 63° | 67° | 0.08" | — |
| 1977 | 80° | 47° | 63° | — | — |
| 1976 | 87° | 48° | 68° | — | — |
| 1975 | 62° | 53° | 58° | — | — |
| 1974 | 66° | 49° | 57° | — | — |
| 1973 | 61° | 42° | 51° | 0.81" | — |
| 1972 | 71° | 54° | 62° | — | — |
| 1971 | 70° | 53° | 61° | — | — |
56 years of data from FULLERTON MUNI AP