Seattle in July rewards travelers with average highs of 25°C and overnight lows around 14°C. Expect around 6 rainy days, making it one of the drier periods in the city. With 13 daily sunshine hours on average, conditions are comfortable for sightseeing at a relaxed pace. The month of July in Seattle experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 39% to 25%. The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 75% of the time. July stands out as the hottest month in Seattle, with temperatures reaching an average high of 75.9°F (24.4°C). Clear skies, along with extended daylight, mean that sunshine is abundant. Low rainfall characterizes this month, making it an ideal period for outdoor activities. Seattle weather in July: average high 22.9°C, low 12.8°C, 25 mm rainfall, plus records, trends and year-by-year history from NASA POWER data since 1981. What is the weather like in Seattle in July? In July, Seattle averages a 24.9 °C (77 °F) daytime high and a 14.6 °C (58 °F) overnight low, with about 9.7 mm (0.4 in) of precipitation over the month, roughly 12.8 hours of sunshine a day and relative humidity near 66%. Seattle in July averages 25°C during the day and 14°C at night. This is the driest month of the year, and part of the summer season. Dry conditions dominate this month. A great time for outdoor fun and exploration. On average, there are about 4 days with rain during this month, averaging 14 mm. Explore our comprehensive guide to Seattle's July weather, featuring detailed insights on temperature ranges, humidity levels, daily sunshine duration, and crucial UV Index information. Seattle, Washington enjoys spectacular summer weather during July. This is the sunniest and least humid month of the year, and often the least rainy. This page gives detailed information on the typical July temperature, precipitation, sun, humidity, wind and storms for Seattle. Seattle in July: average high 78°F, low 58°F, typical rainfall, and which forecast model is most accurate here. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Seattle.