May weather in American Canyon, CA
The average temperature in American Canyon in May is 60.5°F (47.8°F–73.1°F). Average precipitation: 0.80 inches.
May is a spring month in American Canyon, and is warmer than the annual average of 57.7°F. Daily temperatures swing about 25.3°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 14h 4m. For travel, May is a comfortable month to visit.
Avg High
73.1°F
Avg Low
47.8°F
Precipitation
0.80 in
Daylight
14h 4m
May records in American Canyon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (2017) | 34.0°F (2008) | 0.61 in (2009) |
| May 2 | 93.0°F (2017) | 37.0°F (2002) | 0.54 in (2003) |
| May 3 | 93.0°F (2021) | 36.0°F (2008) | 0.57 in (2003) |
| May 4 | 84.9°F (2021) | 36.0°F (1999) | 0.69 in (2024) |
| May 5 | 84.9°F (2025) | 37.0°F (2003) | 0.07 in (2009) |
| May 6 | 90.0°F (2007) | 37.9°F (2003) | 0.15 in (2023) |
| May 7 | 93.0°F (2001) | 37.0°F (2010) | 0.32 in (2000) |
| May 8 | 91.9°F (2001) | 36.0°F (1999) | 0.81 in (2005) |
| May 9 | 87.1°F (2025) | 33.1°F (2003) | 0.05 in (2005) |
| May 10 | 93.9°F (2021) | 32.0°F (2022) | 0.16 in (2010) |
| May 11 | 84.0°F (2018) | 32.0°F (2022) | 0.11 in (2020) |
| May 12 | 84.0°F (2014) | 37.0°F (2002) | 0.32 in (2020) |
| May 13 | 89.1°F (2014) | 37.0°F (1999) | 0.06 in (2020) |
| May 14 | 95.0°F (2008) | 39.0°F (2017) | 0.34 in (2000) |
| May 15 | 100.9°F (2008) | 34.0°F (1999) | 0.92 in (2019) |
| May 16 | 95.0°F (2008) | 37.0°F (1999) | 0.35 in (2011) |
| May 17 | 95.0°F (2009) | 41.0°F (1999) | 0.23 in (2020) |
| May 18 | 91.0°F (2022) | 39.0°F (2013) | 0.33 in (2005) |
| May 19 | 88.0°F (2017) | 39.9°F (2003) | 1.10 in (2019) |
| May 20 | 91.0°F (2013) | 37.9°F (2021) | 0.26 in (2002) |
| May 21 | 96.1°F (2000) | 37.0°F (2021) | 0.36 in (2006) |
| May 22 | 91.9°F (2000) | 35.1°F (2010) | 0.00 in (1998) |
| May 23 | 91.0°F (2000) | 6.1°F (2005) | 0.00 in (1998) |
| May 24 | 93.0°F (2022) | 37.9°F (2011) | 0.03 in (2008) |
| May 25 | 93.9°F (2020) | 42.1°F (2001) | 0.19 in (2010) |
| May 26 | 98.1°F (2020) | 39.9°F (1998) | 0.10 in (1998) |
| May 27 | 89.1°F (2020) | 42.1°F (2012) | 0.50 in (1998) |
| May 28 | 91.9°F (2003) | 35.1°F (2010) | 0.67 in (1998) |
| May 29 | 87.1°F (2002) | 37.9°F (2006) | 0.20 in (1998) |
| May 30 | 100.0°F (2001) | 39.9°F (2013) | 0.00 in (1998) |
| May 31 | 96.1°F (2001) | 41.0°F (2011) | 0.01 in (1998) |