August Weather in Spokane, United States

Last updated: June 24, 2025

In August, the average temperature in Spokane, United States is a pleasant 23°C (73°F). With a temperature range that can dip to a chilly 7°C (45°F) at night and rise up to a scorching 39°C (103°F) during the day, expect varied weather. The area experiences a modest precipitation amount of 11 mm (0.5 in) over just 2 days, while the average humidity hovers around 62%, ensuring a comfortable atmosphere.

August Temperature in Spokane

In August in Spokane, the average temperature is 23°C (73°F), with maximums soaring to 39°C (103°F) and minimums dipping as low as 7°C (45°F). Be prepared for a wide range of weather conditions while traveling, so pack accordingly!

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

The chart illustrates August temperature patterns in Spokane, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spokane, August typically has an average temperature of 23°C (73°F), with highs reaching up to 39°C (103°F) and lows dropping to around 7°C (45°F).

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

August Precipitation in Spokane

In Spokane in August, the precipitation amount is 11 mm (0.5 in) over the course of 2 days.

August Precipitation Trends in Spokane

The chart displays monthly precipitation patterns in Spokane, 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 Spokane, August typically receives around 11 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 Spokane

In Spokane in August humidity is 62%. With an average temperature of 23°C (73°F), this humidity feels like a warm, tropical embrace, making it perfect for travelers who enjoy exploring vibrant streets and outdoor attractions, though it can lead to a bit of stickiness that calls for frequent breaks in shaded spots or refreshing drinks.

August Average Humidity in Spokane

This chart illustrates the average monthly humidity levels in Spokane, 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 Spokane is approximately 62%, 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 Spokane

In Spokane in August, 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 Spokane.

Maximum UV Index Levels in Spokane for August

The chart shows the monthly maximum UV Index (UVI) for Spokane 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 Spokane typically reaches 9, which falls under the very high exposure category.

Data source: Spokane 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 Spokane Compares to Other Months

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

This table compares monthly weather conditions in Spokane, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	76 mm (3.0 inches)	85%	low
February Weather	-1°C (30°F)	65 mm (2.6 inches)	86%	moderate
March Weather	4°C (40°F)	60 mm (2.4 inches)	86%	moderate
April Weather	8°C (47°F)	52 mm (2.1 inches)	82%	high
May Weather	14°C (58°F)	50 mm (2.0 inches)	77%	very high
June Weather	19°C (66°F)	21 mm (0.8 inches)	79%	very high
July Weather	23°C (75°F)	4 mm (0.1 inches)	77%	very high
August Weather	23°C (73°F)	11 mm (0.5 inches)	62%	very high
September Weather	17°C (62°F)	30 mm (1.2 inches)	60%	high
October Weather	8°C (47°F)	55 mm (2.2 inches)	80%	moderate
November Weather	3°C (38°F)	79 mm (3.1 inches)	87%	moderate
December Weather	0°C (32°F)	74 mm (2.9 inches)	86%	low