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 August weather reaches an average high of 76.3°F (24.6°C) and an average low of 54°F (12.2°C), making it the warmest month. In August, the average ocean temperature in Seattle is 53.6°F (12°C).
• Spokane - August »
  The month with the least rainfall in Spokane is August, when the rain falls for 5.8 days and typically collects 0.35" (9mm) of precipitation. The month with the least rainfall in Spokane is August, when the rain falls for 5.8 days and typically collects 0.35" (9mm) of precipitation.
• Tacoma - August »
  With an average ocean temperature of 53.8°F (12.1°C), August is the month with the warmest seawater in Tacoma, Washington. August is Tacoma's warmest month, registering average high temperatures of 78.1°F (25.6°C) and lows of 52.7°F (11.5°C).
• 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 5:55 am and sunset at 8:38 pm.
• Bellevue - August »
  The month with the most sunshine in Bellevue is August, with an average of 10.7h of sunshine. With average high and low temperatures of 76.6°F (24.8°C) and 53.4°F (11.9°C) respectively, August is Bellevue's warmest month.
• Kent - August »
  In Kent during August, the rain falls for 6.2 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Kent temperatures reach their average annual highs in August, measuring 77°F (25°C) and a minimum average of 52.7°F (11.5°C).
• Everett - August »
  With an average ocean temperature of 53.6°F (12°C), August is the month with the warmest seawater in Everett. In Everett August records the highest average temperatures, peaking at 73°F (22.8°C) and reaching a low of 52.5°F (11.4°C).
• 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 »
  In Federal Way during August, the rain falls for 5.9 days and regularly aggregates up to 0.63" (16mm) of precipitation. On the first day of August in Federal Way sunrise is at 5:48 am and sunset at 8:42 pm.
• Yakima - August »
  August stands out as Yakima's warmest month, with an average high-temperature of 86.5°F (30.3°C) and a low-temperature of 60.3°F (15.7°C). The months with the lowest humidity in Yakima are July and August, with an average relative humidity of 39%.
• Kirkland - August »
  The month with the most sunshine in Kirkland is August, with an average of 10.7h of sunshine. As the calendar turns to August, Kirkland basks in the final full summer month with temperatures matching July’s highs.
• Bellingham - August »
  August is the month with the warmest seawater in Bellingham, Washington, with an average ocean temperature of 53.2°F (11.8°C). August temperatures in Bellingham, Washington, vary between a high-temperature of 70.3°F (21.3°C) and a low-temperature of 53.2°F (11.8°C).