Weather on June 18
Mission Viejo, CA
55 Years of Data
Avg High
79°F
Avg Low
57°F
Warmest
2016
80°F avg
Coldest
1975
60°F avg
About This Date
June 18th in Mission Viejo, CA typically brings pleasant summer weather, with average highs around 79°F and lows near 57°F. Over 55 years of records, the warmest June 18th was in 2016 (80°F average), while the coldest was 1975 (60°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 4% of June 18th dates historically. 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 June 18th in Mission Viejo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 56° | 69° | — | — |
| 2024 | 74° | 56° | 65° | — | — |
| 2023 | 72° | 57° | 64° | — | — |
| 2022 | 75° | 56° | 65° | — | — |
| 2021 | 77° | 60° | 69° | — | — |
| 2020 | 73° | 55° | 64° | — | — |
| 2019 | 71° | 57° | 64° | — | — |
| 2018 | 75° | 57° | 66° | — | — |
| 2017 | 84° | 56° | 70° | — | — |
| 2016warmest | 97° | 63° | 80° | — | — |
| 2015 | 83° | 56° | 69° | — | — |
| 2014 | 74° | 52° | 63° | — | — |
| 2013 | 76° | 53° | 64° | — | — |
| 2012 | 82° | 56° | 69° | — | — |
| 2011 | 76° | 55° | 65° | — | — |
| 2010 | 75° | 54° | 64° | — | — |
| 2009 | 78° | 55° | 67° | — | — |
| 2008 | 95° | 55° | 75° | — | — |
| 2007 | 78° | 53° | 66° | — | — |
| 2006 | 82° | 60° | 71° | — | — |
| 2005 | 75° | 53° | 64° | — | — |
| 2004 | 73° | 59° | 66° | — | — |
| 2003 | 70° | 56° | 63° | — | — |
| 2002 | 83° | 54° | 68° | — | — |
| 2001 | 91° | 55° | 73° | — | — |
| 2000 | 77° | 60° | 69° | — | — |
| 1999 | 78° | 55° | 67° | — | — |
| 1998 | 76° | 58° | 67° | — | — |
| 1997 | 77° | 60° | 69° | — | — |
| 1996 | 82° | 58° | 70° | — | — |
| 1995 | 76° | 52° | 64° | — | — |
| 1994 | 84° | 57° | 71° | — | — |
| 1993 | 87° | 65° | 76° | — | — |
| 1992 | 79° | 57° | 68° | — | — |
| 1991 | 72° | 59° | 65° | — | — |
| 1990 | 77° | 62° | 70° | — | — |
| 1989 | 87° | 60° | 74° | — | — |
| 1988 | 73° | 56° | 64° | — | — |
| 1987 | 75° | 51° | 63° | — | — |
| 1986 | 81° | 57° | 69° | — | — |
| 1985 | 80° | 60° | 70° | — | — |
| 1984 | 80° | 63° | 71° | — | — |
| 1983 | 78° | 60° | 69° | — | — |
| 1982 | 64° | 57° | 61° | 0.05" | — |
| 1981 | 90° | 65° | 77° | — | — |
| 1980 | 76° | 58° | 67° | — | — |
| 1979 | 72° | 58° | 65° | — | — |
| 1978 | 84° | 62° | 73° | — | — |
| 1977 | 77° | 56° | 66° | — | — |
| 1976 | 83° | 59° | 71° | — | — |
| 1975coldest | 65° | 55° | 60° | 0.08" | — |
| 1974 | 74° | 49° | 61° | — | — |
| 1973 | 84° | 52° | 68° | — | — |
| 1972 | 78° | 58° | 68° | — | — |
| 1971 | 82° | 60° | 71° | — | — |
55 years of data from EL TORO MCAS