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

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).

Rain

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.

Sun

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.

Humidity

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 Time	2 am	5 am	8 am	11 am	2 pm	5 pm	8 pm	11 pm
Humidity %	39	45	40	28	22	20	25	33

Wind

7.1 mph

July wind speed average

11.4 kph

July is a windier than most other months in Phoenix.

Storms

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.