May weather in Vacaville, CA
The average temperature in Vacaville in May is 66.1°F (51.1°F–81.0°F). Average precipitation: 0.81 inches.
May is a spring month in Vacaville, and is warmer than the annual average of 62.1°F. Daily temperatures swing about 29.9°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 14h 5m. For travel, May is a comfortable month to visit.
Avg High
81.0°F
Avg Low
51.1°F
Precipitation
0.81 in
Daylight
14h 5m
May records in Vacaville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (2015) | 43.0°F (2018) | 0.55 in (2009) |
| May 2 | 93.0°F (2017) | 44.1°F (2019) | 0.53 in (2003) |
| May 3 | 96.1°F (2017) | 43.0°F (2020) | 0.29 in (2003) |
| May 4 | 93.0°F (2021) | 39.0°F (1999) | 0.52 in (2024) |
| May 5 | 95.0°F (2021) | 37.0°F (2024) | 0.14 in (2016) |
| May 6 | 91.0°F (2001) | 37.0°F (2024) | 0.26 in (2013) |
| May 7 | 97.0°F (2001) | 37.0°F (2023) | 0.39 in (2000) |
| May 8 | 97.0°F (2001) | 41.0°F (1999) | 0.68 in (2005) |
| May 9 | 95.0°F (2001) | 37.9°F (2003) | 0.37 in (2005) |
| May 10 | 98.1°F (2001) | 34.0°F (2022) | 0.22 in (2022) |
| May 11 | 95.0°F (2021) | 34.0°F (2022) | 0.07 in (1998) |
| May 12 | 95.0°F (2021) | 41.0°F (2000) | 0.56 in (1998) |
| May 13 | 96.1°F (2023) | 41.0°F (1999) | 0.03 in (1998) |
| May 14 | 96.1°F (2006) | 44.1°F (1998) | 0.34 in (2000) |
| May 15 | 100.0°F (2008) | 39.9°F (1999) | 1.12 in (2019) |
| May 16 | 102.9°F (2008) | 43.0°F (2011) | 0.31 in (2011) |
| May 17 | 105.1°F (2008) | 37.9°F (1998) | 0.44 in (2011) |
| May 18 | 100.9°F (2022) | 44.1°F (1998) | 1.03 in (2019) |
| May 19 | 100.9°F (2001) | 45.0°F (2019) | 0.44 in (2002) |
| May 20 | 102.0°F (2001) | 43.0°F (1998) | 0.52 in (2002) |
| May 21 | 100.9°F (2000) | 44.1°F (1998) | 1.28 in (2006) |
| May 22 | 99.0°F (2000) | 41.0°F (2002) | 0.03 in (2006) |
| May 23 | 102.0°F (2000) | 45.0°F (2010) | 0.00 in (1998) |
| May 24 | 102.0°F (2022) | 44.1°F (2013) | 0.00 in (1998) |
| May 25 | 105.1°F (2022) | 48.0°F (1998) | 0.21 in (2011) |
| May 26 | 102.0°F (2020) | 45.0°F (1998) | 0.04 in (2019) |
| May 27 | 104.0°F (2020) | 48.0°F (1998) | 0.33 in (2010) |
| May 28 | 102.0°F (2020) | 42.1°F (2010) | 1.73 in (1998) |
| May 29 | 100.0°F (2018) | 44.1°F (2011) | 0.25 in (1998) |
| May 30 | 102.0°F (2001) | 43.0°F (1998) | 0.01 in (1998) |
| May 31 | 106.0°F (2001) | 48.0°F (1998) | 0.03 in (2011) |