Weather on March 18
Mission Viejo, CA
55 Years of Data
Avg High
69°F
Avg Low
48°F
Warmest
2026
72°F avg
Coldest
2012
46°F avg
About This Date
March 18th in Mission Viejo, CA typically brings mild spring weather, with average highs around 69°F and lows near 48°F. Over 56 years of records, the warmest March 18th was in 2026 (72°F average), while the coldest was 2012 (46°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 11% of March 18th dates historically, with the wettest March 18th recording 2.59" 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 18th in Mission Viejo, CA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 78° | 67° | 72° | — | — |
| 2025 | 68° | 44° | 56° | — | — |
| 2024 | 71° | 50° | 61° | — | — |
| 2023 | 75° | 52° | 63° | — | — |
| 2022 | 78° | 53° | 66° | — | — |
| 2021 | 69° | 44° | 57° | — | — |
| 2020 | 58° | 43° | 50° | — | — |
| 2019 | 75° | 53° | 64° | — | — |
| 2018 | 61° | 43° | 52° | — | — |
| 2017 | 76° | 48° | 62° | — | — |
| 2016 | 74° | 51° | 62° | — | — |
| 2015 | 71° | 55° | 63° | — | — |
| 2014 | 71° | 50° | 61° | — | — |
| 2013 | 64° | 51° | 58° | — | — |
| 2012coldest | 52° | 41° | 46° | — | — |
| 2011 | 67° | 45° | 56° | — | — |
| 2010 | 76° | 51° | 63° | — | — |
| 2009 | 87° | 51° | 69° | — | — |
| 2008 | 72° | 44° | 58° | — | — |
| 2007 | 65° | 49° | 57° | — | — |
| 2006 | 55° | 42° | 49° | — | — |
| 2005 | 66° | 49° | 57° | — | — |
| 2004 | 74° | 50° | 62° | — | — |
| 2003 | 67° | 44° | 55° | — | — |
| 2002 | 68° | 40° | 54° | — | — |
| 2001 | 81° | 52° | 66° | — | — |
| 2000 | 81° | 51° | 66° | — | — |
| 1999 | 65° | 45° | 55° | — | — |
| 1998 | 70° | 53° | 61° | — | — |
| 1997 | 79° | 49° | 64° | — | — |
| 1996 | 70° | 55° | 62° | — | — |
| 1995 | 70° | 55° | 62° | — | — |
| 1994 | 78° | 56° | 67° | — | — |
| 1993 | 70° | 57° | 63° | — | — |
| 1992 | 64° | 49° | 56° | — | — |
| 1991 | 67° | 48° | 57° | 0.61" | — |
| 1990 | 75° | 49° | 62° | — | — |
| 1989 | 70° | 46° | 58° | — | — |
| 1988 | 81° | 47° | 64° | — | — |
| 1987 | 68° | 48° | 58° | — | — |
| 1986 | 71° | 44° | 58° | — | — |
| 1985 | 58° | 43° | 50° | 0.18" | — |
| 1984 | 80° | 50° | 65° | — | — |
| 1983 | 59° | 46° | 53° | 2.59" | — |
| 1982 | 58° | 40° | 49° | 1.57" | — |
| 1981 | 71° | 47° | 59° | — | — |
| 1980 | 60° | 48° | 54° | 0.28" | — |
| 1979 | 59° | 47° | 53° | 0.33" | — |
| 1978 | 73° | 56° | 64° | — | — |
| 1977 | 64° | 40° | 52° | — | — |
| 1976 | 67° | 43° | 55° | — | — |
| 1975 | 71° | 45° | 58° | — | — |
| 1974 | 62° | 46° | 54° | — | — |
| 1973 | 63° | 46° | 54° | — | — |
| 1972 | 68° | 51° | 60° | — | — |
| 1971 | 76° | 49° | 62° | — | — |
56 years of data from EL TORO MCAS