Weather on August 20
Murrieta, CA
55 Years of Data
Avg High
89°F
Avg Low
61°F
Warmest
1986
88°F avg
Coldest
2011
66°F avg
About This Date
August 20th in Murrieta, CA typically brings warm summer weather, with average highs around 89°F and lows near 61°F — a 28°F daily swing. Over 55 years of records, the warmest August 20th was in 1986 (88°F average), while the coldest was 2011 (66°F) — a 22°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 August 20th in Murrieta, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 66° | 80° | — | — |
| 2024 | 98° | 71° | 85° | — | — |
| 2023 | 74° | 59° | 66° | — | — |
| 2022 | 82° | 60° | 71° | — | — |
| 2021 | 78° | 59° | 69° | — | — |
| 2020 | 94° | 69° | 81° | — | — |
| 2019 | 89° | 67° | 78° | — | — |
| 2018 | 83° | 63° | 73° | — | — |
| 2017 | 81° | 56° | 68° | — | — |
| 2016 | 84° | 65° | 74° | — | — |
| 2015 | 82° | 58° | 70° | — | — |
| 2014 | 74° | 59° | 66° | — | — |
| 2013 | 89° | 66° | 78° | — | — |
| 2012 | 91° | 66° | 79° | — | — |
| 2011coldest | 79° | 54° | 66° | — | — |
| 2010 | 92° | 69° | 80° | — | — |
| 2009 | 84° | 59° | 72° | — | — |
| 2008 | 82° | 61° | 71° | — | — |
| 2007 | 96° | 70° | 83° | — | — |
| 2006 | 87° | 55° | 71° | — | — |
| 2005 | 87° | 62° | 75° | — | — |
| 2004 | 80° | 57° | 69° | — | — |
| 2003 | 89° | 63° | 76° | — | — |
| 2002 | 77° | 58° | 67° | — | — |
| 2001 | 86° | 61° | 73° | — | — |
| 2000 | 84° | 61° | 72° | — | — |
| 1999 | 89° | 65° | 77° | — | — |
| 1998 | 89° | 60° | 75° | — | — |
| 1997 | 92° | 65° | 78° | — | — |
| 1996 | 90° | 60° | 75° | — | — |
| 1995 | 88° | 64° | 76° | — | — |
| 1994 | 87° | 59° | 73° | — | — |
| 1993 | 86° | 60° | 73° | — | — |
| 1992 | 107° | 70° | 88° | — | — |
| 1991 | 98° | 59° | 79° | — | — |
| 1990 | 85° | 54° | 69° | — | — |
| 1989 | 88° | 58° | 73° | — | — |
| 1988 | 99° | 59° | 79° | — | — |
| 1987 | 95° | 53° | 74° | — | — |
| 1986warmest | 105° | 71° | 88° | — | — |
| 1985 | 96° | 55° | 76° | — | — |
| 1984 | 90° | 70° | 80° | — | — |
| 1983 | 84° | 65° | 74° | — | — |
| 1982 | 107° | 66° | 87° | — | — |
| 1981 | 102° | 61° | 81° | — | — |
| 1980 | 91° | 48° | 70° | — | — |
| 1979 | 85° | 57° | 71° | — | — |
| 1978 | 93° | 51° | 72° | — | — |
| 1977 | 98° | 70° | 84° | — | — |
| 1976 | 89° | 55° | 72° | — | — |
| 1975 | 83° | 54° | 68° | — | — |
| 1974 | 87° | 57° | 72° | — | — |
| 1973 | 92° | 68° | 80° | — | — |
| 1972 | 90° | 56° | 73° | — | — |
| 1971 | 95° | 57° | 76° | — | — |
55 years of data from SANTA ROSA PLATEAU CALIFORNIA