Phoenix Weather in July

The hot summer temperatures that descend on Phoenix, Arizona usually peak in early July. Along with the extreme heat, this month sees an increase in humidity and thunderstorms.

This page gives detailed information on the typical July temperature, precipitation, sun, humidity, wind and storms for Phoenix. The weather measurements are averages based on climate data gathered at Phoenix Sky Harbor International Airport, located near the city center.

Temperature Weather iconTemperature

107 °F July average high 41 °C
85 °F July average low 29 °C

July is Phoenix's hottest month overall, with temperatures peaking from the 11th to 19th. These dates have daily highs averaging 107 degrees Fahrenheit (42 degrees Celsius) and nightime lows 85 °F (29 °C).

29 days 100 °F max. or more (38 °C)
0 days 70 °F min. or less (21 °C)

During July, the temperature in Phoenix usually doesn't dip below 70 °F (21 °C).

Rainy Weather iconRain

0.9 in total precipitation 23 mm
4 days of rain

Half the time, Phoenix receives 0.2 to 1.3 inches (5 to 32 mm) of rainfall in July. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

85 % sunshine
17 days clear skies

The sun's rays reach the ground in Phoenix during 85 percent of daylight hours on average in July, for a total of 371 hours in the month. Typically on 17 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in July at Phoenix lasts for 14 hours and 6 minutes a day on average. The longest day of the month is the 1st with 14 hours and 20 minutes of daylight. By the end of the month, the days have shortened to 13:48 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

32 % July average humidity

The relative humidity in Phoenix during July usually peaks at 45 percent in the morning then drops to 20 percent by late afternoon.

Local Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 39 45 40 28 22 20 25 33

Windy Weather iconWind

7.1 mph July wind speed average 11.4 kph

July is a windier than most other months in Phoenix.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
6 days with thunderstorms in July

Every few years, Phoenix receives an inch (25 mm) or more of rain in one day during July.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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