August Weather in Tualatin, United States

Last updated: June 24, 2025

In August, the average temperature in Tualatin, United States is a comfortable 21°C (70°F). However, you might encounter a minimum of 9°C (48°F) and a scorching maximum of 40°C (104°F). Expect a modest precipitation of 8 mm (0.3 in) over just 2 days and enjoy a relatively high average humidity of 74%.

August Temperature in Tualatin

In August in Tualatin, the average temperature is 21°C (70°F). Maximum temperatures can reach 40°C (104°F), while the minimum can drop to as low as 9°C (48°F). This makes Tualatin an ideal destination for travelers seeking warm weather, though it's wise to pack for a range of temperatures.

August Weather in Tualatin: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Tualatin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tualatin, August typically has an average temperature of 21°C (70°F), with highs reaching up to 40°C (104°F) and lows dropping to around 9°C (48°F).

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

August Precipitation in Tualatin

In Tualatin in August, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

August Precipitation Trends in Tualatin

The chart displays monthly precipitation patterns in Tualatin, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Tualatin, August typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Tualatin

In Tualatin in August humidity is 74%. With an average temperature of 21°C (70°F), this humidity feels like a warm, moist embrace, making outdoor activities both invigorating and slightly draining, so travelers should stay hydrated and take breaks often.

August Average Humidity in Tualatin

This chart illustrates the average monthly humidity levels in Tualatin, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Tualatin is approximately 74%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Tualatin

In Tualatin in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Tualatin.

Maximum UV Index Levels in Tualatin for August

The chart shows the monthly maximum UV Index (UVI) for Tualatin in August, 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 August, the maximum UV index in Tualatin typically reaches 8, which falls under the very high exposure category.

Data source: Tualatin August 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 August Weather in Tualatin Compares to Other Months

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

This table compares monthly weather conditions in Tualatin, showing how August’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