August weather in Phoenix, AZ
The average temperature in Phoenix in August is 91.5°F (80.5°F–102.5°F). Average precipitation: 0.96 inches.
August is a summer month in Phoenix, and is warmer than the annual average of 72.5°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 13h 15m. For travel, August is hot.
Avg High
102.5°F
Avg Low
80.5°F
Precipitation
0.96 in
Daylight
13h 15m
August records in Phoenix
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 111.0°F (2008) | 73.0°F (2010) | 0.33 in (2014) |
| August 2 | 111.0°F (2025) | 70.0°F (2005) | 0.55 in (2014) |
| August 3 | 111.0°F (2024) | 72.0°F (2005) | 0.70 in (2017) |
| August 4 | 113.0°F (2024) | 73.0°F (2022) | 0.29 in (2022) |
| August 5 | 114.1°F (2019) | 72.0°F (2016) | 0.67 in (2016) |
| August 6 | 113.0°F (2018) | 73.9°F (2013) | 0.03 in (2010) |
| August 7 | 115.0°F (2025) | 73.0°F (2010) | 0.29 in (2008) |
| August 8 | 113.0°F (2012) | 69.1°F (2009) | 0.12 in (2023) |
| August 9 | 109.9°F (2002) | 71.1°F (2009) | 0.07 in (2001) |
| August 10 | 109.9°F (2002) | 73.0°F (1999) | 0.39 in (1999) |
| August 11 | 109.0°F (2012) | 70.0°F (1999) | 0.30 in (2015) |
| August 12 | 111.9°F (2012) | 72.0°F (1999) | 0.64 in (2014) |
| August 13 | 111.9°F (2020) | 71.1°F (2009) | 0.82 in (2021) |
| August 14 | 115.0°F (2020) | 71.1°F (2001) | 1.03 in (2003) |
| August 15 | 111.9°F (2015) | 73.0°F (2025) | 0.00 in (1999) |
| August 16 | 111.9°F (2020) | 72.0°F (2017) | 0.09 in (2023) |
| August 17 | 111.0°F (2020) | 70.0°F (2021) | 0.54 in (2021) |
| August 18 | 109.9°F (2011) | 72.0°F (2022) | 0.75 in (2021) |
| August 19 | 111.0°F (2020) | 70.0°F (2014) | 0.65 in (2014) |
| August 20 | 111.0°F (2019) | 73.0°F (2014) | 0.11 in (2016) |
| August 21 | 111.9°F (2019) | 70.0°F (2014) | 0.66 in (2012) |
| August 22 | 109.0°F (1999) | 69.1°F (2014) | 0.14 in (2010) |
| August 23 | 109.9°F (2011) | 71.1°F (2012) | 0.63 in (2012) |
| August 24 | 111.9°F (2020) | 72.0°F (2006) | 1.53 in (2006) |
| August 25 | 109.9°F (2020) | 71.1°F (2008) | 1.08 in (2008) |
| August 26 | 111.0°F (2001) | 71.1°F (2008) | 0.31 in (2025) |
| August 27 | 109.9°F (2011) | 73.0°F (2016) | 0.54 in (1999) |
| August 28 | 111.9°F (2023) | 73.9°F (2016) | 0.45 in (2013) |
| August 29 | 109.9°F (2005) | 72.0°F (2000) | 0.18 in (2008) |
| August 30 | 109.0°F (2011) | 70.0°F (2020) | 0.21 in (2020) |
| August 31 | 109.0°F (2011) | 69.1°F (2000) | 0.12 in (2023) |