August Weather in Tumwater, United States

Last updated: June 24, 2025

In Tumwater, United States, the average temperature in August hovers around 19°C (66°F). With daytime highs reaching up to 34°C (93°F) and lows dipping to 9°C (49°F), the climate can vary significantly. Expect about 12 mm (0.5 in) of precipitation over 2 days, and enjoy an average humidity level of 73% that adds to the overall atmosphere.

August Temperature in Tumwater

In August in Tumwater, the average temperature is 19°C (66°F). Maximums can reach 34°C (93°F), while minimums can drop to as low as 9°C (49°F). This makes it an ideal time for travelers to enjoy a pleasant mix of warm days and cooler evenings.

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

The chart illustrates August temperature patterns in Tumwater, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tumwater, August typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (93°F) and lows dropping to around 9°C (49°F).

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

August Precipitation in Tumwater

In Tumwater in August, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

August Precipitation Trends in Tumwater

The chart displays monthly precipitation patterns in Tumwater, 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 Tumwater, August typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Tumwater

In Tumwater in August humidity is 73%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making travel enjoyable yet slightly sticky, as you find yourself seeking shade and refreshing drinks while exploring.

August Average Humidity in Tumwater

This chart illustrates the average monthly humidity levels in Tumwater, 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 Tumwater is approximately 73%, 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 Tumwater

In Tumwater 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 Tumwater.

Maximum UV Index Levels in Tumwater for August

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

Data source: Tumwater 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 Tumwater Compares to Other Months

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

This table compares monthly weather conditions in Tumwater, 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)	197 mm (7.8 inches)	86%	low
February Weather	5°C (41°F)	155 mm (6.1 inches)	84%	moderate
March Weather	7°C (45°F)	134 mm (5.3 inches)	85%	moderate
April Weather	10°C (50°F)	117 mm (4.6 inches)	83%	high
May Weather	13°C (56°F)	65 mm (2.6 inches)	84%	very high
June Weather	16°C (61°F)	51 mm (2.0 inches)	84%	very high
July Weather	18°C (65°F)	9 mm (0.4 inches)	82%	very high
August Weather	19°C (66°F)	12 mm (0.5 inches)	73%	very high
September Weather	16°C (61°F)	88 mm (3.5 inches)	74%	high
October Weather	11°C (52°F)	133 mm (5.3 inches)	83%	moderate
November Weather	8°C (46°F)	192 mm (7.5 inches)	86%	moderate
December Weather	5°C (42°F)	203 mm (8.0 inches)	87%	low