Weather on August 18
San Diego, CA
55 Years of Data
Avg High
77°F
Avg Low
68°F
Warmest
1986
80°F avg
Coldest
1988
67°F avg
About This Date
August 18th in San Diego, CA typically brings pleasant summer weather, with average highs around 77°F and lows near 68°F. Over 55 years of records, the warmest August 18th was in 1986 (80°F average), while the coldest was 1988 (67°F) — a 13°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 18th dates historically. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in San Diego, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 66° | 70° | — | — |
| 2024 | 79° | 68° | 73° | — | — |
| 2023 | 75° | 66° | 71° | — | — |
| 2022 | 81° | 69° | 75° | — | — |
| 2021 | 79° | 73° | 76° | — | — |
| 2020 | 83° | 72° | 77° | — | — |
| 2019 | 74° | 66° | 70° | — | — |
| 2018 | 83° | 73° | 78° | — | — |
| 2017 | 77° | 68° | 73° | — | — |
| 2016 | 78° | 67° | 72° | — | — |
| 2015 | 80° | 71° | 76° | — | — |
| 2014 | 77° | 69° | 73° | — | — |
| 2013 | 70° | 64° | 67° | — | — |
| 2012 | 86° | 72° | 79° | — | — |
| 2011 | 73° | 64° | 69° | — | — |
| 2010 | 82° | 69° | 76° | — | — |
| 2009 | 74° | 65° | 69° | — | — |
| 2008 | 76° | 69° | 72° | — | — |
| 2007 | 81° | 70° | 75° | — | — |
| 2006 | 78° | 69° | 74° | — | — |
| 2005 | 75° | 66° | 71° | — | — |
| 2004 | 74° | 67° | 70° | — | — |
| 2003 | 75° | 66° | 71° | — | — |
| 2002 | 69° | 64° | 67° | — | — |
| 2001 | 79° | 68° | 73° | — | — |
| 2000 | 79° | 69° | 74° | — | — |
| 1999 | 73° | 64° | 69° | — | — |
| 1998 | 76° | 68° | 72° | — | — |
| 1997 | 77° | 65° | 71° | — | — |
| 1996 | 73° | 67° | 70° | — | — |
| 1995 | 77° | 64° | 71° | — | — |
| 1994 | 81° | 71° | 76° | — | — |
| 1993 | 74° | 64° | 69° | — | — |
| 1992 | 83° | 71° | 77° | — | — |
| 1991 | 73° | 64° | 69° | — | — |
| 1990 | 73° | 66° | 70° | — | — |
| 1989 | 76° | 67° | 71° | — | — |
| 1988coldest | 71° | 63° | 67° | — | — |
| 1987 | 72° | 65° | 68° | — | — |
| 1986warmest | 90° | 71° | 80° | — | — |
| 1985 | 75° | 67° | 71° | — | — |
| 1984 | 79° | 75° | 77° | — | — |
| 1983 | 77° | 73° | 75° | 0.13" | — |
| 1982 | 78° | 67° | 72° | — | — |
| 1981 | 78° | 70° | 74° | — | — |
| 1980 | 75° | 70° | 72° | — | — |
| 1979 | 78° | 70° | 74° | — | — |
| 1978 | 77° | 68° | 73° | — | — |
| 1977 | 78° | 69° | 74° | — | — |
| 1976 | 78° | 65° | 71° | — | — |
| 1975 | 73° | 63° | 68° | — | — |
| 1974 | 74° | 64° | 69° | — | — |
| 1973 | 79° | 67° | 73° | — | — |
| 1972 | 73° | 66° | 70° | — | — |
| 1971 | 77° | 69° | 73° | — | — |
55 years of data from SAN DIEGO INTL AP