Weather on August 9
Vacaville, CA
55 Years of Data
Avg High
96°F
Avg Low
58°F
Warmest
1990
91°F avg
Coldest
2013
67°F avg
About This Date
August 9th in Vacaville, CA typically brings hot summer weather, with average highs around 96°F and lows near 58°F — a 38°F daily swing. Over 55 years of records, the warmest August 9th was in 1990 (91°F average), while the coldest was 2013 (67°F) — a 24°F range across recorded history. This date has historically been dry, with little recorded precipitation. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 9th in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 103° | 64° | 83° | — | — |
| 2024 | 102° | 60° | 81° | — | — |
| 2023 | 89° | 59° | 74° | — | — |
| 2022 | 92° | 61° | 76° | — | — |
| 2021 | 97° | 61° | 79° | — | — |
| 2020 | 100° | 62° | 81° | — | — |
| 2019 | 90° | 59° | 74° | — | — |
| 2018 | 102° | 57° | 80° | — | — |
| 2017 | 92° | 60° | 76° | — | — |
| 2016 | 95° | 56° | 75° | — | — |
| 2015 | 97° | 55° | 76° | — | — |
| 2014 | 88° | 59° | 73° | — | — |
| 2013coldest | 83° | 52° | 67° | — | — |
| 2012 | 103° | 59° | 81° | — | — |
| 2011 | 93° | 56° | 74° | — | — |
| 2010 | 87° | 57° | 72° | — | — |
| 2009 | 100° | 64° | 82° | — | — |
| 2008 | 91° | 57° | 74° | — | — |
| 2007 | 93° | 57° | 75° | — | — |
| 2006 | 100° | 61° | 80° | — | — |
| 2005 | 104° | 62° | 83° | — | — |
| 2004 | 96° | 58° | 77° | — | — |
| 2003 | 90° | 60° | 75° | — | — |
| 2002 | 104° | 57° | 81° | — | — |
| 2001 | 94° | 65° | 79° | — | — |
| 2000 | 89° | 56° | 72° | — | — |
| 1999 | 85° | 57° | 71° | — | — |
| 1998 | 84° | 56° | 70° | — | — |
| 1997 | 100° | 60° | 80° | — | — |
| 1996 | 107° | 63° | 85° | — | — |
| 1995 | 99° | 60° | 79° | — | — |
| 1994 | 94° | 50° | 72° | — | — |
| 1993 | 91° | 54° | 72° | — | — |
| 1992 | 97° | 57° | 77° | — | — |
| 1991 | 97° | 60° | 78° | — | — |
| 1990warmest | 109° | 74° | 91° | — | — |
| 1989 | 96° | 60° | 78° | — | — |
| 1988 | 97° | 55° | 76° | — | — |
| 1987 | 92° | 57° | 74° | — | — |
| 1986 | 91° | 51° | 71° | — | — |
| 1985 | 96° | 56° | 76° | — | — |
| 1984 | 106° | 54° | 80° | — | — |
| 1983 | 97° | 56° | 76° | — | — |
| 1982 | 98° | 58° | 78° | — | — |
| 1981 | 102° | 59° | 81° | — | — |
| 1980 | 95° | 54° | 74° | — | — |
| 1979 | 98° | 54° | 76° | — | — |
| 1978 | 107° | 64° | 86° | — | — |
| 1977 | 89° | 54° | 71° | — | — |
| 1976 | 92° | 55° | 73° | — | — |
| 1975 | 101° | 56° | 78° | — | — |
| 1974 | 95° | 51° | 73° | — | — |
| 1973 | 87° | 52° | 69° | — | — |
| 1972 | 98° | 62° | 80° | — | — |
| 1971 | 103° | 59° | 81° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS