Weather in Phoenix in August
August in Phoenix is warm with average temperatures around 33.0°C (91.4°F). Light rainfall with only 34mm expected.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
39.8°C
103.6°F
Low
26.3°C
79.3°F
Precipitation
34 mm
1.3 inches
~8 rainy days
Conditions
Humidity
35%
Comparison to Adjacent Months
August is 2.8°C warmer than September.