July Weather in Portland, United States

Last updated: June 24, 2025

In July, the average temperature in Portland, United States is a pleasant 24°C (75°F). Temperatures can fluctuate, with a minimum of 13°C (57°F) and a maximum reaching 36°C (98°F). Expect around 156 mm (6.1 in) of precipitation over 13 days, resulting in an average humidity of 62%. Prepare for a month of warmth with occasional showers!

July Temperature in Portland

In July in Portland, the average temperature is 24°C (75°F). The maximum can reach 36°C (98°F), and the minimum can be as low as 13°C (57°F). This diverse temperature range makes it essential for travelers to pack for both warm days 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 36°C (98°F) and lows dropping to around 13°C (57°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 precipitation amount is 156 mm (6.1 in) spread over 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 156 mm (6.1 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 62%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making for a sticky yet comfortable travel experience that invites you to explore but may require occasional breaks to rehydrate and cool down.

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 62%, 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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, 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	0°C (32°F)	67 mm (2.6 inches)	84%	moderate
February Weather	1°C (34°F)	89 mm (3.5 inches)	82%	moderate
March Weather	4°C (40°F)	90 mm (3.6 inches)	81%	high
April Weather	10°C (49°F)	126 mm (5.0 inches)	78%	very high
May Weather	15°C (60°F)	111 mm (4.4 inches)	69%	very high
June Weather	20°C (69°F)	94 mm (3.7 inches)	69%	very high
July Weather	24°C (75°F)	156 mm (6.1 inches)	62%	very high
August Weather	23°C (74°F)	96 mm (3.8 inches)	65%	very high
September Weather	20°C (67°F)	99 mm (3.9 inches)	68%	very high
October Weather	14°C (58°F)	130 mm (5.1 inches)	74%	high
November Weather	7°C (44°F)	90 mm (3.6 inches)	82%	moderate
December Weather	2°C (36°F)	127 mm (5.0 inches)	80%	low