July Weather in Portland, United States

Last updated: June 24, 2025

In July, the average temperature in Portland, United States hovers around 24°C (75°F). Expect minimums of 12°C (54°F), while the maximum can rise to 35°C (96°F). During this month, be prepared for 124 mm (4.9 in) of precipitation, spread over 13 days, with an average humidity of 65%.

July Temperature in Portland

In July in Portland, the average temperature is 24°C (75°F). The maximum can reach 35°C (96°F) and the minimum can be as low as 12°C (54°F). This weather makes it ideal for travelers seeking pleasant, warm conditions with opportunities to enjoy both the sun and cooler evenings.

July Weather in Portland: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Portland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland, July typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (96°F) and lows dropping to around 12°C (54°F).

Data source: Temperature data for Portland generated using information from the Copernicus Climate Change Service.

July Precipitation in Portland

In Portland in July, the total precipitation amount is 124 mm (4.9 in) over a span of 13 days.

July Precipitation Trends in Portland

The chart displays monthly precipitation patterns in Portland, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Portland, July typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

July Humidity in Portland

In Portland in July humidity is 65%. With average temperature 24°C (75°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a bit sticky but still enjoyable for exploring sights and sounds.

July Average Humidity in Portland

This chart illustrates the average monthly humidity levels in Portland, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Portland is approximately 65%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Portland

In Portland in July, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Portland.

Maximum UV Index Levels in Portland for July

The chart shows the monthly maximum UV Index (UVI) for Portland in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in Portland typically reaches 10, which falls under the very high exposure category.

Data source: Portland July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How July Weather in Portland Compares to Other Months

Weather in Portland varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Portland, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Portland, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	71 mm (2.8 inches)	87%	moderate
February Weather	1°C (34°F)	102 mm (4.0 inches)	85%	moderate
March Weather	4°C (39°F)	94 mm (3.7 inches)	85%	high
April Weather	10°C (50°F)	110 mm (4.3 inches)	83%	very high
May Weather	16°C (61°F)	135 mm (5.3 inches)	75%	very high
June Weather	21°C (69°F)	92 mm (3.6 inches)	73%	very high
July Weather	24°C (75°F)	124 mm (4.9 inches)	65%	very high
August Weather	23°C (73°F)	125 mm (4.9 inches)	62%	very high
September Weather	19°C (67°F)	107 mm (4.2 inches)	66%	very high
October Weather	14°C (57°F)	141 mm (5.5 inches)	79%	high
November Weather	6°C (42°F)	90 mm (3.5 inches)	87%	moderate
December Weather	2°C (35°F)	106 mm (4.2 inches)	85%	low