August weather in Vacaville, CA
The average temperature in Vacaville in August is 75.9°F (57.9°F–93.8°F). Average precipitation: 0.02 inches.
August is a summer month in Vacaville, and is warmer than the annual average of 62.1°F. Daily temperatures swing about 35.9°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 13h 30m. For travel, August is hot.
Avg High
93.8°F
Avg Low
57.9°F
Precipitation
0.02 in
Daylight
13h 30m
August records in Vacaville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 109.0°F (2014) | 53.1°F (2020) | 0.00 in (1999) |
| August 2 | 107.1°F (2017) | 53.1°F (2013) | 0.00 in (1999) |
| August 3 | 108.0°F (2017) | 54.0°F (2018) | 0.00 in (1999) |
| August 4 | 106.0°F (2007) | 55.0°F (2013) | 0.00 in (1999) |
| August 5 | 105.1°F (2005) | 51.1°F (2016) | 0.01 in (2017) |
| August 6 | 105.1°F (2005) | 48.9°F (2002) | 0.00 in (1999) |
| August 7 | 105.1°F (2005) | 52.0°F (2016) | 0.00 in (1999) |
| August 8 | 107.1°F (2001) | 53.1°F (2006) | 0.00 in (1999) |
| August 9 | 104.0°F (2002) | 52.0°F (2013) | 0.00 in (1999) |
| August 10 | 106.0°F (2018) | 55.0°F (2000) | 0.00 in (1999) |
| August 11 | 106.0°F (2012) | 54.0°F (1999) | 0.00 in (1999) |
| August 12 | 102.0°F (2002) | 54.0°F (2010) | 0.00 in (1999) |
| August 13 | 106.0°F (2012) | 52.0°F (2003) | 0.00 in (1999) |
| August 14 | 107.1°F (2008) | 52.0°F (2007) | 0.00 in (1999) |
| August 15 | 111.0°F (2020) | 53.1°F (2003) | 0.01 in (2023) |
| August 16 | 108.0°F (2022) | 55.0°F (2001) | 0.00 in (1999) |
| August 17 | 106.0°F (2015) | 53.1°F (2006) | 0.00 in (1999) |
| August 18 | 108.0°F (2020) | 51.1°F (2025) | 0.00 in (1999) |
| August 19 | 104.0°F (2013) | 52.0°F (2025) | 0.00 in (1999) |
| August 20 | 105.1°F (2022) | 51.1°F (2002) | 0.00 in (1999) |
| August 21 | 104.0°F (2025) | 52.0°F (2001) | 0.20 in (2003) |
| August 22 | 102.0°F (2022) | 53.1°F (2010) | 0.16 in (2003) |
| August 23 | 102.0°F (2025) | 48.0°F (2002) | 0.00 in (1999) |
| August 24 | 107.1°F (2010) | 48.0°F (2021) | 0.00 in (1999) |
| August 25 | 109.0°F (2010) | 50.0°F (2002) | 0.01 in (2003) |
| August 26 | 106.0°F (2017) | 52.0°F (2021) | 0.00 in (1999) |
| August 27 | 108.0°F (2017) | 48.0°F (2012) | 0.00 in (1999) |
| August 28 | 109.9°F (2017) | 48.9°F (2016) | 0.00 in (1999) |
| August 29 | 107.1°F (2009) | 52.0°F (2003) | 0.00 in (1999) |
| August 30 | 102.9°F (2007) | 53.1°F (2015) | 0.00 in (1999) |
| August 31 | 102.9°F (2017) | 54.0°F (2002) | 0.00 in (1999) |