August weather in San Luis, AZ
The average temperature in San Luis in August is 94.8°F (83.2°F–106.4°F). Average precipitation: 0.20 inches.
August is a summer month in San Luis, and is warmer than the annual average of 76°F. Daily temperatures swing about 23.2°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 13h 12m. For travel, August is hot.
Avg High
106.4°F
Avg Low
83.2°F
Precipitation
0.20 in
Daylight
13h 12m
August records in San Luis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 118.0°F (1993) | 77.0°F (2009) | 0.09 in (2017) |
| August 2 | 116.1°F (1994) | 79.0°F (1984) | 0.02 in (2014) |
| August 3 | 116.1°F (1998) | 75.9°F (2025) | 0.00 in (1982) |
| August 4 | 117.0°F (2021) | 75.9°F (2014) | 1.31 in (2005) |
| August 5 | 116.1°F (1983) | 77.0°F (1987) | 0.11 in (1987) |
| August 6 | 115.0°F (2025) | 75.0°F (1991) | 0.04 in (1982) |
| August 7 | 114.1°F (2001) | 73.0°F (1988) | 0.11 in (2008) |
| August 8 | 114.1°F (2012) | 73.9°F (2009) | 0.11 in (1983) |
| August 9 | 116.1°F (1996) | 70.0°F (1996) | 3.51 in (1989) |
| August 10 | 115.0°F (2003) | 73.0°F (1988) | 0.10 in (2005) |
| August 11 | 114.1°F (2012) | 75.0°F (2013) | 0.08 in (2001) |
| August 12 | 117.0°F (1996) | 75.9°F (2013) | 0.21 in (1982) |
| August 13 | 117.0°F (2012) | 72.0°F (1988) | 0.39 in (2022) |
| August 14 | 115.0°F (2015) | 70.0°F (1985) | 0.21 in (2021) |
| August 15 | 117.0°F (2015) | 73.0°F (1988) | 0.53 in (1983) |
| August 16 | 116.1°F (1992) | 72.0°F (1988) | 0.21 in (1983) |
| August 17 | 115.0°F (1992) | 75.9°F (1984) | 0.16 in (1984) |
| August 18 | 115.0°F (1992) | 72.0°F (1983) | 0.11 in (1983) |
| August 19 | 114.1°F (1982) | 73.0°F (1983) | 0.60 in (1984) |
| August 20 | 113.0°F (2019) | 73.0°F (2023) | 0.66 in (1988) |
| August 21 | 114.1°F (2019) | 73.0°F (2014) | 0.41 in (2014) |
| August 22 | 113.0°F (2011) | 72.0°F (2014) | 0.27 in (1992) |
| August 23 | 115.0°F (2011) | 68.0°F (1992) | 0.13 in (1992) |
| August 24 | 118.9°F (1985) | 70.0°F (1992) | 0.50 in (1984) |
| August 25 | 115.0°F (2020) | 71.1°F (1989) | 1.12 in (2025) |
| August 26 | 115.0°F (2020) | 70.0°F (1989) | 0.29 in (2010) |
| August 27 | 116.1°F (2023) | 72.0°F (1989) | 0.06 in (2003) |
| August 28 | 118.0°F (2023) | 75.0°F (1989) | 0.20 in (2008) |
| August 29 | 117.0°F (1984) | 73.9°F (1989) | 0.56 in (1993) |
| August 30 | 115.0°F (1984) | 70.0°F (2010) | 0.12 in (2012) |
| August 31 | 114.1°F (1987) | 71.1°F (1992) | 0.00 in (1982) |