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 (12.8°C). The eastern regions, including Moses Lake and Kennewick, see nighttime lows usually varying from 55°F (12.8°C) to 60°F (15.6°C).

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" (25mm) and the eastern half often less than 0.5" (13mm). Winds during this month are moderate, primarily oscillating between 5 to 15mph (24.1km/h) (8.05 to 15mph (24.1km/h)), 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 »
  Seattle's temperature records reveal August as the warmest month, marked by average highs of 76.3°F (24.6°C) and lows of 54°F (12.2°C). The month with the warmest seawater in Seattle is August, with an average ocean temperature of 53.6°F (12°C).
• Spokane - August »
  The least humid month in Spokane 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 »
  August is the month with the warmest seawater in Tacoma with an average ocean temperature of 53.8°F (12.1°C). Tacoma's warmest weather arrives in August, when temperatures average a high of 78.1°F (25.6°C) and a low of 52.7°F (11.5°C).
• Vancouver - August »
  In Vancouver during August, the rain falls for 4.9 days and regularly aggregates up to 0.39" (10mm) of precipitation. August weather in Vancouver, Washington sees a continuation of the warm temperatures from July but with a more marked decrease in humidity.
• Bellevue - August »
  Bellevue registers the highest average temperatures during the month of August, with peaks of 76.6°F (24.8°C) and lows of 53.4°F (11.9°C). August, characterized by an average high temperature of 76.6°F (24.8°C) and a low temperature of 53.4°F (11.9°C), is generally the warmest month in Bellevue.
• Kent - August »
  On the first day of August in Kent sunrise is at 5:47 am and sunset at 8:43 pm. August has the most sunshine of the year in Kent, Washington, with an average of 10.8h of sunshine.
• Everett - August »
  Everett, Washington, experiences its highest temperatures in August, with an average peak of 73°F (22.8°C) and a low of 52.5°F (11.4°C). In Everett, August registers the highest temperatures, averaging 73°F (22.8°C) at the peak and 52.5°F (11.4°C) at the lowest.
• Renton - August »
  The month with the most sunshine in Renton is August, with an average of 10.6h of sunshine. July and August, with an average relative humidity of 68%, are the least humid months in Renton.
• Federal Way - August »
  In Federal Way in August, during 5.9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Federal Way, August is the month with the highest recorded average temperatures, measuring a high of 77.5°F (25.3°C) and a low of 52.9°F (11.6°C).
• Yakima - August »
  The months with the most sunshine in Yakima are July and August, with an average of 12.1h of sunshine. 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 in August, it is raining for 6.1 days, with typically 0.55" (14mm) of accumulated precipitation.
• Bellingham - August »
  The month with the warmest seawater in Bellingham is August, with an average ocean temperature of 53.2°F (11.8°C). July and August, with an average high-temperature of 70.3°F (21.3°C), are marked as the warmest months in Bellingham, Washington.