Weather on August 20
Norwalk, CA
55 Years of Data
Avg High
85°F
Avg Low
66°F
Warmest
2007
85°F avg
Coldest
1985
67°F avg
About This Date
August 20th in Norwalk, CA typically brings warm summer weather, with average highs around 85°F and lows near 66°F. Over 55 years of records, the warmest August 20th was in 2007 (85°F average), while the coldest was 1985 (67°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 20th dates historically, with the wettest August 20th recording 5.11" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Norwalk, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 66° | 80° | — | — |
| 2024 | 96° | 65° | 80° | — | — |
| 2023 | 77° | 65° | 71° | 5.11" | — |
| 2022 | 83° | 70° | 76° | — | — |
| 2021 | 82° | 69° | 76° | — | — |
| 2020 | 96° | 74° | 85° | — | — |
| 2019 | 89° | 63° | 76° | — | — |
| 2018 | 87° | 70° | 78° | — | — |
| 2017 | 82° | 68° | 75° | — | — |
| 2016 | 86° | 65° | 75° | — | — |
| 2015 | 84° | 70° | 77° | — | — |
| 2014 | 85° | 69° | 77° | — | — |
| 2013 | 91° | 67° | 79° | — | — |
| 2012 | 91° | 74° | 82° | — | — |
| 2011 | 79° | 65° | 72° | — | — |
| 2010 | 91° | 63° | 77° | — | — |
| 2009 | 83° | 63° | 73° | — | — |
| 2008 | 81° | 65° | 73° | — | — |
| 2007warmest | 98° | 72° | 85° | — | — |
| 2006 | 84° | 62° | 73° | — | — |
| 2005 | 86° | 62° | 74° | — | — |
| 2004 | 79° | 65° | 72° | — | — |
| 2003 | 85° | 68° | 76° | — | — |
| 2002 | 76° | 64° | 70° | — | — |
| 2001 | 81° | 65° | 73° | — | — |
| 2000 | 82° | 63° | 72° | — | — |
| 1999 | 83° | 62° | 72° | — | — |
| 1998 | 87° | 60° | 74° | — | — |
| 1997 | 88° | 70° | 79° | — | — |
| 1996 | 87° | 63° | 75° | — | — |
| 1995 | 82° | 64° | 73° | — | — |
| 1994 | 86° | 68° | 77° | — | — |
| 1993 | 83° | 64° | 73° | — | — |
| 1992 | 95° | 67° | 81° | — | — |
| 1991 | 84° | 63° | 73° | — | — |
| 1990 | 79° | 65° | 72° | — | — |
| 1989 | 75° | 63° | 69° | — | — |
| 1988 | 79° | 63° | 71° | — | — |
| 1987 | 80° | 61° | 70° | — | — |
| 1986 | 97° | 69° | 83° | — | — |
| 1985coldest | 76° | 59° | 67° | — | — |
| 1984 | 86° | 71° | 79° | — | — |
| 1983 | 84° | 69° | 77° | — | — |
| 1982 | 94° | 67° | 80° | — | — |
| 1981 | 93° | 60° | 77° | — | — |
| 1980 | 81° | 60° | 70° | — | — |
| 1979 | 82° | 66° | 74° | — | — |
| 1978 | 83° | 61° | 72° | — | — |
| 1977 | 91° | 71° | 81° | — | — |
| 1976 | 83° | 68° | 75° | — | — |
| 1975 | 79° | 61° | 70° | — | — |
| 1974 | 78° | 67° | 72° | — | — |
| 1973 | 80° | 70° | 75° | — | — |
| 1972 | 84° | 59° | 72° | — | — |
| 1971 | 84° | 71° | 78° | — | — |
55 years of data from FULLERTON MUNI AP