Weather on March 21
Newport Beach, CA
55 Years of Data
Avg High
65°F
Avg Low
53°F
Warmest
2026
69°F avg
Coldest
1971
52°F avg
About This Date
March 21st in Newport Beach, CA typically brings mild spring weather, with average highs around 65°F and lows near 53°F. Over 56 years of records, the warmest March 21st was in 2026 (69°F average), while the coldest was 1971 (52°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 23% of March 21st dates historically, with the wettest March 21st recording 3.76" 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 Newport Beach, CA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 79° | 60° | 69° | — | — |
| 2025 | 66° | 50° | 58° | — | — |
| 2024 | 64° | 56° | 60° | — | — |
| 2023 | 61° | 52° | 56° | 1.96" | — |
| 2022 | 65° | 54° | 59° | — | — |
| 2021 | 61° | 51° | 56° | — | — |
| 2020 | 63° | 54° | 58° | — | — |
| 2019 | 62° | 56° | 59° | — | — |
| 2018 | 70° | 56° | 63° | — | — |
| 2017 | 65° | 56° | 60° | — | — |
| 2016 | 64° | 58° | 61° | — | — |
| 2015 | 68° | 61° | 64° | — | — |
| 2014 | 64° | 57° | 61° | — | — |
| 2013 | 62° | 57° | 60° | — | — |
| 2012 | 66° | 49° | 57° | — | — |
| 2011 | 57° | 47° | 52° | 1.07" | — |
| 2010 | 65° | 52° | 58° | — | — |
| 2009 | 61° | 54° | 57° | — | — |
| 2008 | 66° | 47° | 56° | — | — |
| 2007 | 60° | 55° | 58° | 0.15" | — |
| 2006 | 59° | 50° | 55° | 0.05" | — |
| 2005 | 64° | 52° | 58° | — | — |
| 2004 | 63° | 55° | 59° | — | — |
| 2003 | 67° | 52° | 59° | — | — |
| 2002 | 63° | 53° | 58° | — | — |
| 2001 | 63° | 54° | 58° | — | — |
| 2000 | 70° | 49° | 59° | — | — |
| 1999 | 70° | 52° | 61° | 0.03" | — |
| 1998 | 63° | 56° | 59° | — | — |
| 1997 | 72° | 54° | 63° | — | — |
| 1996 | 61° | 55° | 58° | — | — |
| 1995 | 62° | 52° | 57° | 1.14" | — |
| 1994 | 73° | 50° | 62° | — | — |
| 1993 | 63° | 58° | 60° | — | — |
| 1992 | 62° | 51° | 57° | 3.76" | — |
| 1991 | 56° | 48° | 52° | 0.25" | — |
| 1990 | 65° | 53° | 59° | — | — |
| 1989 | 74° | 53° | 63° | — | — |
| 1988 | 75° | 53° | 64° | — | — |
| 1987 | 61° | 49° | 55° | 0.38" | — |
| 1986 | 75° | 51° | 63° | — | — |
| 1985 | 63° | 51° | 57° | — | — |
| 1984 | 71° | 54° | 62° | — | — |
| 1983 | 64° | 52° | 58° | 1.19" | — |
| 1982 | 65° | 44° | 54° | — | — |
| 1981 | 64° | 49° | 56° | — | — |
| 1980 | 65° | 52° | 58° | 0.08" | — |
| 1979 | 58° | 52° | 55° | 1.17" | — |
| 1978 | 66° | 59° | 63° | 0.05" | — |
| 1977 | 62° | 49° | 55° | — | — |
| 1976 | 69° | 47° | 58° | — | — |
| 1975 | 61° | 51° | 56° | — | — |
| 1974 | 63° | 50° | 56° | — | — |
| 1973 | 59° | 50° | 55° | — | — |
| 1972 | 62° | 55° | 59° | — | — |
| 1971coldest | 58° | 47° | 52° | — | — |
56 years of data from NEWPORT BEACH HARBOR