Weather on August 4
Vacaville, CA
55 Years of Data
Avg High
93°F
Avg Low
58°F
Warmest
1998
88°F avg
Coldest
1976
68°F avg
About This Date
August 4th in Vacaville, CA typically brings hot summer weather, with average highs around 93°F and lows near 58°F — a 35°F daily swing. Over 55 years of records, the warmest August 4th was in 1998 (88°F average), while the coldest was 1976 (68°F) — a 20°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for August 4th in Vacaville, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 92° | 57° | 74° | — | — |
| 2024 | 101° | 64° | 82° | — | — |
| 2023 | 97° | 56° | 76° | — | — |
| 2022 | 103° | 68° | 85° | — | — |
| 2021 | 103° | 59° | 81° | — | — |
| 2020 | 93° | 60° | 77° | — | — |
| 2019 | 98° | 60° | 79° | — | — |
| 2018 | 100° | 60° | 80° | — | — |
| 2017 | 96° | 76° | 86° | — | — |
| 2016 | 87° | 56° | 71° | — | — |
| 2015 | 81° | 55° | 68° | — | — |
| 2014 | 83° | 60° | 71° | — | — |
| 2013 | 89° | 55° | 72° | — | — |
| 2012 | 83° | 57° | 70° | — | — |
| 2011 | 84° | 58° | 71° | — | — |
| 2010 | 92° | 58° | 75° | — | — |
| 2009 | 89° | 59° | 74° | — | — |
| 2008 | 92° | 57° | 74° | — | — |
| 2007 | 106° | 59° | 82° | — | — |
| 2006 | 89° | 60° | 75° | — | — |
| 2005 | 100° | 60° | 80° | — | — |
| 2004 | 92° | 59° | 75° | — | — |
| 2003 | 88° | 62° | 75° | — | — |
| 2002 | 82° | 56° | 69° | — | — |
| 2001 | 89° | 59° | 74° | — | — |
| 2000 | 94° | 63° | 78° | — | — |
| 1999 | 93° | 60° | 77° | — | — |
| 1998warmest | 110° | 67° | 88° | — | — |
| 1997 | 102° | 58° | 80° | — | — |
| 1996 | 96° | 58° | 77° | — | — |
| 1995 | 102° | 58° | 80° | — | — |
| 1994 | 100° | 56° | 78° | — | — |
| 1993 | 95° | 63° | 79° | — | — |
| 1992 | 98° | 56° | 77° | — | — |
| 1991 | 82° | 54° | 68° | — | — |
| 1990 | 100° | 58° | 79° | — | — |
| 1989 | 94° | 52° | 73° | — | — |
| 1988 | 85° | 54° | 69° | — | — |
| 1987 | 102° | 58° | 80° | — | — |
| 1986 | 100° | 58° | 79° | — | — |
| 1985 | 95° | 58° | 76° | — | — |
| 1984 | 90° | 55° | 72° | — | — |
| 1983 | 89° | 57° | 73° | — | — |
| 1982 | 90° | 51° | 70° | — | — |
| 1981 | 87° | 54° | 70° | — | — |
| 1980 | 80° | 57° | 69° | — | — |
| 1979 | 88° | 52° | 70° | — | — |
| 1978 | 96° | 62° | 79° | — | — |
| 1977 | 95° | 57° | 76° | — | — |
| 1976coldest | 85° | 52° | 68° | — | — |
| 1975 | 95° | 56° | 75° | — | — |
| 1974 | 101° | 60° | 80° | — | — |
| 1973 | 99° | 50° | 74° | — | — |
| 1972 | 91° | 53° | 72° | — | — |
| 1971 | 92° | 54° | 73° | — | — |
55 years of data from VACAVILLE/NUT TREE AP ASOS