Weather on May 9
Mission Viejo, CA
55 Years of Data
Avg High
73°F
Avg Low
53°F
Warmest
2025
77°F avg
Coldest
1977
56°F avg
About This Date
May 9th in Mission Viejo, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 53°F. Over 55 years of records, the warmest May 9th was in 2025 (77°F average), while the coldest was 1977 (56°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 9th dates historically, with the wettest May 9th recording 0.81" of rain. The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.6°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Mission Viejo, CA? Great weather for outdoor activities.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 97° | 58° | 77° | — | — |
| 2024 | 73° | 52° | 62° | — | — |
| 2023 | 68° | 50° | 59° | — | — |
| 2022 | 67° | 48° | 57° | — | — |
| 2021 | 70° | 53° | 61° | — | — |
| 2020 | 74° | 55° | 64° | — | — |
| 2019 | 63° | 56° | 59° | — | — |
| 2018 | 76° | 54° | 65° | — | — |
| 2017 | 67° | 52° | 59° | — | — |
| 2016 | 69° | 51° | 60° | — | — |
| 2015 | 63° | 50° | 56° | — | — |
| 2014 | 72° | 52° | 62° | — | — |
| 2013 | 70° | 51° | 60° | — | — |
| 2012 | 76° | 55° | 65° | — | — |
| 2011 | 63° | 50° | 56° | — | — |
| 2010 | 66° | 49° | 57° | — | — |
| 2009 | 77° | 53° | 65° | — | — |
| 2008 | 64° | 52° | 58° | — | — |
| 2007 | 87° | 55° | 71° | — | — |
| 2006 | 60° | 53° | 57° | — | — |
| 2005 | 72° | 54° | 63° | — | — |
| 2004 | 82° | 54° | 68° | — | — |
| 2003 | 67° | 48° | 57° | — | — |
| 2002 | 76° | 51° | 63° | — | — |
| 2001 | 82° | 54° | 68° | — | — |
| 2000 | 77° | 57° | 67° | — | — |
| 1999 | 62° | 52° | 57° | — | — |
| 1998 | 67° | 56° | 61° | — | — |
| 1997 | 78° | 59° | 69° | — | — |
| 1996 | 77° | 55° | 66° | — | — |
| 1995 | 71° | 49° | 60° | — | — |
| 1994 | 73° | 54° | 63° | — | — |
| 1993 | 94° | 59° | 76° | — | — |
| 1992 | 69° | 62° | 66° | — | — |
| 1991 | 70° | 57° | 63° | — | — |
| 1990 | 71° | 57° | 64° | — | — |
| 1989 | 74° | 60° | 67° | — | — |
| 1988 | 74° | 47° | 60° | — | — |
| 1987 | 76° | 59° | 67° | — | — |
| 1986 | 79° | 54° | 66° | — | — |
| 1985 | 66° | 54° | 60° | 0.05" | — |
| 1984 | 92° | 60° | 76° | — | — |
| 1983 | 72° | 54° | 63° | — | — |
| 1982 | 64° | 53° | 59° | 0.08" | — |
| 1981 | 89° | 55° | 72° | — | — |
| 1980 | 69° | 57° | 63° | — | — |
| 1979 | 70° | 44° | 57° | — | — |
| 1978 | 82° | 56° | 69° | — | — |
| 1977coldest | 61° | 52° | 56° | 0.81" | — |
| 1976 | 75° | 53° | 64° | — | — |
| 1975 | 75° | 51° | 63° | — | — |
| 1974 | 62° | 52° | 57° | — | — |
| 1973 | 78° | 52° | 65° | — | — |
| 1972 | 69° | 48° | 59° | — | — |
| 1971 | 75° | 50° | 63° | — | — |
55 years of data from EL TORO MCAS