Portland Weather in July

July offers terrific summer weather for Portland, Oregon. This is the city's sunniest and least rainy time of the year.

This page gives detailed information on the typical July temperature, precipitation, sun, humidity, wind and storms for Portland. The numbers here are historical averages based on climate data gathered near the Portland International Airport, located a few miles from downtown Portland.

Temperature

82 °F	July average high	28 °C
57 °F	July average low	14 °C

The days at Portland warm steadily during July, until they peak for the year from the 22nd to the 31st and on into August. These dates have daily highs averaging 83 degrees Fahrenheit (28 degrees Celsius) and lows of 58 °F (14 °C).

19 days	80 °F max. or more (27 °C)
26 days	60 °F min. or less (16 °C)

Nearly every day in July warms to over 70 °F (21 °C) in Portland. The city averages 6 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures of 100 °F (38 °C) occur every few years here during July.

At night, the thermometer dips just once on average to below 51 °F (11 °C) . But July does not normally get as cold as 40 °F (4 °C).

Rain

0.7 in	total precipitation	17 mm
3 days	of rain

Half the time, the city receives 0.2 to 1.0 inches (6 to 26 mm) of rainfall for the entire month. One in four years has drier weather, while another one in four is wetter.

Sun

69 %	sunshine
13 days	clear skies

July is the sunniest month for Portland. The sun's rays reach the ground during 69 percent of daylight hours on average, for a total of 326 hours in the month. Typically on 13 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in July at Portland lasts for 15 hours and 15 minutes a day on average. The longest day of the month is the 1st with 15 hours and 37 minutes of daylight. By the end of the month, the days have shortened to 14:46 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humidity

63 %	July average humidity

July is the least humid month for Portland. The relative humidity in Portland during July usually peaks at 80 percent in the morning then drops to 44 percent by mid afternoon.

Local Time	1 am	4 am	7 am	10 am	1 pm	4 pm	7 pm	10 pm
Humidity %	74	80	76	61	49	44	52	66

Wind

7.6 mph

July wind speed average

12.2 kph

July is a little less windy than most other months in Portland.

Storms

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

Rainstorms are less common in July than other months at Portland. A storm that drops half an inch or more rain in a day occurs during this month only about once a decade. Portland normally never receives as much as an inch (25 mm) of rain at once this time of year. A thunderstorm happens in most, but not all, Julys.