Weather on August 15
Vallejo, CA
55 Years of Data
Avg High
85°F
Avg Low
55°F
Warmest
2020
87°F avg
Coldest
1976
58°F avg
About This Date
August 15th in Vallejo, CA typically brings warm summer weather, with average highs around 85°F and lows near 55°F — a 30°F daily swing. Over 55 years of records, the warmest August 15th was in 2020 (87°F average), while the coldest was 1976 (58°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 15th dates historically, with the wettest August 15th recording 0.53" of rain. The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.5°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Vallejo, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 58° | 72° | — | — |
| 2024 | 85° | 58° | 71° | — | — |
| 2023 | 95° | 61° | 78° | — | — |
| 2022 | 96° | 57° | 77° | — | — |
| 2021 | 87° | 58° | 72° | — | — |
| 2020warmest | 107° | 67° | 87° | — | — |
| 2019 | 105° | 63° | 84° | — | — |
| 2018 | 80° | 56° | 68° | — | — |
| 2017 | 79° | 55° | 67° | — | — |
| 2016 | 88° | 53° | 70° | — | — |
| 2015 | 102° | 60° | 81° | — | — |
| 2014 | 80° | 53° | 67° | — | — |
| 2013 | 88° | 52° | 70° | — | — |
| 2012 | 76° | 56° | 66° | — | — |
| 2011 | 76° | 47° | 61° | — | — |
| 2010 | 74° | 49° | 61° | — | — |
| 2009 | 84° | 49° | 66° | — | — |
| 2008 | 81° | 54° | 67° | — | — |
| 2007 | 85° | 51° | 68° | — | — |
| 2006 | 73° | 54° | 63° | — | — |
| 2005 | 72° | 55° | 63° | — | — |
| 2004 | 79° | 56° | 67° | — | — |
| 2003 | 83° | 54° | 68° | — | — |
| 2002 | 78° | 55° | 67° | — | — |
| 2001 | 90° | 52° | 71° | — | — |
| 2000 | 87° | 55° | 71° | — | — |
| 1999 | 79° | 57° | 68° | — | — |
| 1998 | 88° | 56° | 72° | — | — |
| 1997 | 79° | 58° | 68° | — | — |
| 1996 | 96° | 55° | 76° | — | — |
| 1995 | 82° | 56° | 69° | — | — |
| 1994 | 100° | 57° | 79° | — | — |
| 1993 | 80° | 54° | 67° | — | — |
| 1992 | 96° | 62° | 79° | — | — |
| 1991 | 86° | 56° | 71° | — | — |
| 1990 | 80° | 58° | 69° | — | — |
| 1989 | 100° | 56° | 78° | — | — |
| 1988 | 87° | 51° | 69° | — | — |
| 1987 | 87° | 57° | 72° | — | — |
| 1986 | 78° | 53° | 66° | — | — |
| 1985 | 74° | 51° | 62° | — | — |
| 1984 | 88° | 55° | 71° | — | — |
| 1983 | 100° | 58° | 79° | — | — |
| 1982 | 87° | 51° | 69° | — | — |
| 1981 | 91° | 54° | 72° | — | — |
| 1980 | 86° | 50° | 68° | — | — |
| 1979 | 86° | 57° | 72° | — | — |
| 1978 | 90° | 54° | 72° | — | — |
| 1977 | 89° | 53° | 71° | — | — |
| 1976coldest | 65° | 52° | 58° | 0.53" | — |
| 1975 | 72° | 53° | 62° | — | — |
| 1974 | 85° | 55° | 70° | — | — |
| 1973 | 90° | 52° | 71° | — | — |
| 1972 | 74° | 55° | 64° | — | — |
| 1971 | 85° | 58° | 71° | — | — |
55 years of data from VALLEJO