July Weather in Lake Oswego, United States

Last updated: June 24, 2025

In Lake Oswego, United States, the average temperature in July hovers around 21°C (69°F). Expect a minimum of 9°C (49°F) and a maximum reaching up to 37°C (99°F). During this month, precipitation is minimal, with an average of just 6 mm (0.2 in) over the course of 1 day. The average humidity is a moist 82%, making it a perfect time to embrace the local atmosphere.

July Temperature in Lake Oswego

In July in Lake Oswego, the average temperature is 21°C (69°F). Maximums can reach 37°C (99°F), and minimums can be as low as 9°C (49°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while also being prepared for cooler evenings.

July Weather in Lake Oswego: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Lake Oswego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Oswego, July typically has an average temperature of 21°C (69°F), with highs reaching up to 37°C (99°F) and lows dropping to around 9°C (49°F).

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

July Precipitation in Lake Oswego

In Lake Oswego in July, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

July Precipitation Trends in Lake Oswego

The chart displays monthly precipitation patterns in Lake Oswego, 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 Lake Oswego, July typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Lake Oswego

In Lake Oswego in July humidity is 82%. With an average temperature of 21°C (69°F), this humidity feels like a sweltering embrace, making outdoor activities feel more strenuous and prompting travelers to seek shade and cooling breezes.

July Average Humidity in Lake Oswego

This chart illustrates the average monthly humidity levels in Lake Oswego, 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 Lake Oswego is approximately 82%, 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 Lake Oswego

In Lake Oswego 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 Lake Oswego.

Maximum UV Index Levels in Lake Oswego for July

The chart shows the monthly maximum UV Index (UVI) for Lake Oswego 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 Lake Oswego typically reaches 10, which falls under the very high exposure category.

Data source: Lake Oswego 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 Lake Oswego Compares to Other Months

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

This table compares monthly weather conditions in Lake Oswego, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	163 mm (6.4 inches)	85%	low
February Weather	5°C (41°F)	172 mm (6.8 inches)	84%	moderate
March Weather	8°C (46°F)	135 mm (5.3 inches)	85%	moderate
April Weather	11°C (51°F)	117 mm (4.6 inches)	83%	high
May Weather	14°C (58°F)	58 mm (2.3 inches)	83%	very high
June Weather	18°C (64°F)	46 mm (1.8 inches)	83%	very high
July Weather	21°C (69°F)	6 mm (0.2 inches)	82%	very high
August Weather	21°C (70°F)	8 mm (0.3 inches)	74%	very high
September Weather	18°C (64°F)	62 mm (2.4 inches)	71%	high
October Weather	12°C (53°F)	105 mm (4.1 inches)	81%	moderate
November Weather	8°C (47°F)	155 mm (6.1 inches)	87%	moderate
December Weather	5°C (41°F)	183 mm (7.2 inches)	87%	low