August weather forecast
Washington, USA

August sustains the summer warmth but begins to hint at the approaching transition to autumn. In western cities such as Everett and Vancouver, average low temperatures generally hover around 55°F. The eastern regions, including Moses Lake and Kennewick, see nighttime lows usually varying from 55°F to 60°F.

The prevalence of sunny days persists in August, although occasional cloud cover may appear, especially in the western part of the state. Precipitation remains scant, with the western regions typically receiving about 1" and the eastern half often less than 0.5". Winds during this month are moderate, primarily oscillating between 5 to 15mph (8.05 to 15mph), making conditions still favorable for a wide range of outdoor activities.

Compared to July, August maintains the warmth but may bring slightly increased humidity and occasional cloud cover, signaling the start of the transition to autumn. Despite the minor changes, it remains a popular month for tourism, with visitors enjoying the state's natural beauty from the San Juan Islands to the Palouse region. September will introduce more significant shifts in weather, including cooler temperatures and increased chances of rain, making it a transitional month that marks the end of the high tourist season.

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• Seattle - August »
  Temperature records in Seattle mark August as the warmest month, with highs averaging 76.3°F and lows at 54°F. August is the month with the warmest seawater in Seattle, Washington, with an average ocean temperature of 53.6°F.
• Spokane - August »
  The least humid month in Spokane, Washington, is August, with an average relative humidity of 38%. The month with the most sunshine in Spokane is August, with an average of 12h of sunshine.
• Tacoma - August »
  The month with the warmest seawater in Tacoma is August, with an average ocean temperature of 53.8°F. With an average ocean temperature of 53.8°F, August is the month with the warmest seawater in Tacoma.
• Vancouver - August »
  August weather in Vancouver, Washington sees a continuation of the warm temperatures from July but with a more marked decrease in humidity. On the first day of August in Vancouver sunrise is at 5:54 am and sunset at 8:39 pm.
• Bellevue - August »
  In Bellevue, August is the warmest month, with temperatures averaging a high of 76.6°F and a low of 53.4°F. Bellevue experiences its average highest temperatures in August, reaching a peak of 76.6°F and a minimum of 53.4°F.
• Kent - August »
  In Kent during August, the rain falls for 6.2 days and regularly aggregates up to 0.59" of precipitation. August registers as the month with the average highest temperatures in Kent, reaching 77°F at its peak and 52.7°F at the lowest.
• Everett - August »
  August is the month with the warmest seawater in Everett with an average ocean temperature of 53.6°F. The month with the warmest seawater in Everett is August, with an average ocean temperature of 53.6°F.
• Renton - August »
  The months with the lowest humidity in Renton are July and August, with an average relative humidity of 68%. August carries forward July's high summer signature into Renton, with consistent sunny days and scant rainfall.
• Federal Way - August »
  On the first day of August in Federal Way sunrise is at 5:47 am and sunset at 8:43 pm. August is the warmest month in Federal Way, exhibiting average temperatures of 77.5°F at the peak and 52.9°F at the base.
• Yakima - August »
  July and August, with an average relative humidity of 39%, are the least humid months in Yakima, Washington. July and August, with an average of 12.1h of sunshine, are months with the most sunshine in Yakima, Washington.
• Kirkland - August »
  As the calendar turns to August, Kirkland basks in the final full summer month with temperatures matching July’s highs. In Kirkland, Washington, during August, the rain falls for 6.1 days and regularly aggregates up to 0.55" of precipitation.
• Bellingham - August »
  July and August, with an average of 10.5h of sunshine, are months with the most sunshine in Bellingham, Washington. In Bellingham, Washington, in August, it is raining for 7.1 days, with typically 0.71" of accumulated precipitation.