Weather on August 21
Murrieta, CA
55 Years of Data
Avg High
90°F
Avg Low
62°F
Warmest
1982
91°F avg
Coldest
2021
65°F avg
About This Date
August 21st in Murrieta, CA typically brings hot summer weather, with average highs around 90°F and lows near 62°F — a 28°F daily swing. Over 55 years of records, the warmest August 21st was in 1982 (91°F average), while the coldest was 2021 (65°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 21st 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 August 21st in Murrieta, CA? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 73° | 83° | — | — |
| 2024 | 93° | 64° | 79° | — | — |
| 2023 | 76° | 59° | 67° | — | — |
| 2022 | 80° | 60° | 70° | — | — |
| 2021coldest | 73° | 58° | 65° | — | — |
| 2020 | 93° | 74° | 83° | — | — |
| 2019 | 93° | 68° | 81° | — | — |
| 2018 | 85° | 63° | 74° | — | — |
| 2017 | 82° | 57° | 70° | — | — |
| 2016 | 88° | 62° | 75° | — | — |
| 2015 | 82° | 58° | 70° | — | — |
| 2014 | 86° | 60° | 73° | — | — |
| 2013 | 93° | 67° | 80° | — | — |
| 2012 | 85° | 63° | 74° | — | — |
| 2011 | 79° | 56° | 67° | — | — |
| 2010 | 90° | 70° | 80° | — | — |
| 2009 | 81° | 67° | 74° | — | — |
| 2008 | 81° | 59° | 70° | — | — |
| 2007 | 93° | 69° | 81° | — | — |
| 2006 | 86° | 61° | 73° | — | — |
| 2005 | 89° | 65° | 77° | — | — |
| 2004 | 81° | 57° | 69° | — | — |
| 2003 | 84° | 61° | 72° | — | — |
| 2002 | 77° | 56° | 66° | — | — |
| 2001 | 79° | 56° | 67° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 92° | 65° | 78° | — | — |
| 1998 | 96° | 67° | 81° | — | — |
| 1997 | 95° | 68° | 82° | — | — |
| 1996 | 92° | 67° | 79° | — | — |
| 1995 | 89° | 68° | 79° | — | — |
| 1994 | 82° | 58° | 70° | — | — |
| 1993 | 87° | 62° | 75° | — | — |
| 1992 | 103° | 68° | 85° | — | — |
| 1991 | 106° | 65° | 85° | — | — |
| 1990 | 89° | 55° | 72° | — | — |
| 1989 | 86° | 60° | 73° | — | — |
| 1988 | 99° | 58° | 78° | — | — |
| 1987 | 89° | 56° | 72° | — | — |
| 1986 | 102° | 70° | 86° | — | — |
| 1985 | 97° | 54° | 75° | — | — |
| 1984 | 94° | 70° | 82° | — | — |
| 1983 | 85° | 65° | 75° | — | — |
| 1982warmest | 108° | 75° | 91° | 0.28" | — |
| 1981 | 105° | 63° | 84° | — | — |
| 1980 | 94° | — | — | — | — |
| 1979 | 89° | 58° | 73° | — | — |
| 1978 | 91° | 56° | 73° | — | — |
| 1977 | 95° | 66° | 81° | — | — |
| 1976 | 96° | 52° | 74° | — | — |
| 1975 | 87° | 56° | 71° | — | — |
| 1974 | 93° | 55° | 74° | — | — |
| 1973 | 98° | 64° | 81° | — | — |
| 1972 | 103° | 64° | 83° | — | — |
| 1971 | 94° | 57° | 75° | — | — |
55 years of data from SANTA ROSA PLATEAU CALIFORNIA