Weather on August 4
Vacaville, CA
55 Years of Data
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.
| 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° | — | — |
Vacaville, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Vacaville, CA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Vacaville, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Vacaville, CA
Vacaville, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.