Weather on August 21
Santa Clarita, CA
55 Years of Data
Avg High
91°F
Avg Low
59°F
Warmest
2025
88°F avg
Coldest
1975
64°F avg
About This Date
August 21st in Santa Clarita, CA typically brings hot summer weather, with average highs around 91°F and lows near 59°F — a 32°F daily swing. Over 53 years of records, the warmest August 21st was in 2025 (88°F average), while the coldest was 1975 (64°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Santa Clarita, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 104° | 72° | 88° | — | — |
| 2024 | 96° | 65° | 80° | — | — |
| 2023 | 79° | 61° | 70° | — | — |
| 2022 | 88° | 64° | 76° | — | — |
| 2021 | 78° | 59° | 69° | — | — |
| 2020 | 97° | 70° | 83° | — | — |
| 2019 | 99° | 66° | 82° | — | — |
| 2018 | 88° | 64° | 76° | — | — |
| 2017 | 87° | 58° | 72° | — | — |
| 2016 | 84° | 69° | 77° | — | — |
| 2015 | 82° | 60° | 71° | — | — |
| 2014 | 89° | 61° | 75° | — | — |
| 2013 | 100° | 64° | 82° | — | — |
| 2012 | 92° | 66° | 79° | — | — |
| 2011 | 90° | 55° | 72° | — | — |
| 2010 | 97° | 64° | 80° | — | — |
| 2009 | 94° | 65° | 79° | — | — |
| 2008 | 91° | 61° | 76° | — | — |
| 2007 | 99° | 66° | 82° | — | — |
| 2006 | 99° | 59° | 79° | — | — |
| 2005 | 97° | 62° | 79° | — | — |
| 2004 | 81° | 56° | 68° | — | — |
| 2003 | 88° | 64° | 76° | — | — |
| 2002 | 77° | 56° | 66° | — | — |
| 2001 | 83° | 58° | 70° | — | — |
| 2000 | 87° | 59° | 73° | — | — |
| 1999 | 100° | 65° | 82° | — | — |
| 1998 | 97° | 61° | 79° | — | — |
| 1997 | 97° | 63° | 80° | — | — |
| 1996 | 99° | 61° | 80° | — | — |
| 1995 | 94° | 65° | 79° | — | — |
| 1994 | 87° | 57° | 72° | — | — |
| 1993 | 91° | 56° | 73° | — | — |
| 1992 | 90° | 61° | 75° | — | — |
| 1991 | 96° | 56° | 76° | — | — |
| 1990 | 88° | 53° | 70° | — | — |
| 1989 | 82° | 53° | 68° | — | — |
| 1988 | 97° | 48° | 72° | — | — |
| 1987 | 92° | 48° | 70° | — | — |
| 1986 | 105° | 63° | 84° | — | — |
| 1985 | 91° | 44° | 68° | — | — |
| 1984 | 92° | 58° | 75° | — | — |
| 1983 | 78° | 55° | 67° | — | — |
| 1982 | 104° | 54° | 79° | — | — |
| 1981 | 99° | 49° | 74° | — | — |
| 1980 | 87° | 46° | 67° | — | — |
| 1978 | 92° | 48° | 70° | — | — |
| 1977 | 97° | 64° | 80° | — | — |
| 1975coldest | 83° | 46° | 64° | — | — |
| 1974 | 85° | 48° | 66° | — | — |
| 1973 | 94° | 67° | 80° | — | — |
| 1972 | 93° | 49° | 71° | — | — |
| 1971 | 91° | 57° | 74° | — | — |
53 years of data from SAUGUS CALIFORNIA