Weather on August 20
Oceanside, CA
55 Years of Data
Avg High
76°F
Avg Low
63°F
Warmest
2020
78°F avg
Coldest
1978
63°F avg
About This Date
August 20th in Oceanside, CA typically brings pleasant summer weather, with average highs around 76°F and lows near 63°F. Over 55 years of records, the warmest August 20th was in 2020 (78°F average), while the coldest was 1978 (63°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 7% of August 20th dates historically, with the wettest August 20th recording 5.72" 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 Oceanside, CA? Great weather for outdoor activities.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 62° | 71° | — | — |
| 2024 | 85° | 58° | 71° | — | — |
| 2023 | 78° | 67° | 72° | 5.72" | — |
| 2022 | 79° | 68° | 73° | — | — |
| 2021 | 79° | 68° | 73° | — | — |
| 2020warmest | 86° | 69° | 78° | — | — |
| 2019 | 80° | 59° | 70° | — | — |
| 2018 | 81° | 68° | 74° | — | — |
| 2017 | 77° | 65° | 71° | — | — |
| 2016 | 76° | 58° | 67° | — | — |
| 2015 | 78° | 69° | 74° | — | — |
| 2014 | 79° | 66° | 72° | 0.28" | — |
| 2013 | 76° | 63° | 69° | — | — |
| 2012 | 84° | 67° | 75° | — | — |
| 2011 | 74° | 64° | 69° | — | — |
| 2010 | 81° | 61° | 71° | — | — |
| 2009 | 74° | 62° | 68° | — | — |
| 2008 | 78° | 63° | 70° | — | — |
| 2007 | 84° | 60° | 72° | — | — |
| 2006 | 75° | 64° | 70° | — | — |
| 2005 | 75° | 56° | 65° | — | — |
| 2004 | 76° | 59° | 67° | — | — |
| 2003 | 79° | 64° | 71° | 0.13" | — |
| 2002 | 75° | 64° | 70° | — | — |
| 2001 | 77° | 60° | 69° | — | — |
| 2000 | 79° | 64° | 71° | — | — |
| 1999 | 71° | 63° | 67° | — | — |
| 1998 | 71° | 61° | 66° | — | — |
| 1997 | 74° | 69° | 71° | — | — |
| 1996 | 72° | 64° | 68° | — | — |
| 1995 | 70° | 65° | 67° | — | — |
| 1994 | 76° | 66° | 71° | — | — |
| 1993 | 69° | 63° | 66° | — | — |
| 1992 | 73° | 66° | 70° | — | — |
| 1991 | 67° | 64° | 65° | — | — |
| 1990 | 71° | 61° | 66° | — | — |
| 1989 | 71° | 64° | 68° | — | — |
| 1988 | 66° | 63° | 64° | — | — |
| 1987 | 68° | 58° | 63° | — | — |
| 1986 | 72° | 66° | 69° | — | — |
| 1985 | 69° | 63° | 66° | — | — |
| 1984 | 76° | 70° | 73° | — | — |
| 1983 | 77° | 68° | 73° | — | — |
| 1982 | 74° | 53° | 63° | — | — |
| 1981 | 75° | 63° | 69° | — | — |
| 1980 | 76° | 59° | 67° | — | — |
| 1979 | 74° | 64° | 69° | 0.1" | — |
| 1978coldest | 72° | 55° | 63° | — | — |
| 1977 | 84° | 64° | 74° | — | — |
| 1976 | 78° | 56° | 67° | — | — |
| 1975 | 74° | 63° | 68° | — | — |
| 1974 | 76° | 64° | 70° | — | — |
| 1973 | 76° | 62° | 69° | — | — |
| 1972 | 78° | 55° | 67° | — | — |
| 1971 | 79° | 66° | 72° | — | — |
55 years of data from OCEANSIDE MUNI AP