August weather forecastBellevue, WA
August
Weather in August
Resembling July, August continues to blaze the summer trail in Bellevue, Washington. Though the humidity tends to go up from July, Bellevue still enjoys the warmth of the sun with the least cloud cover. The city draws families to enjoy picnics in parks and water activities at local beaches. As August progresses, the days gradually grow shorter, marking summer's end and the advent of autumn. Despite occasional showers, the sunshine predominates, making this month one of the best times to enjoy Bellevue's outdoor attractions.Temperature
August registers as the month with the highest average temperatures, reaching 76.6°F (24.8°C) at its peak and 53.4°F (11.9°C) at the lowest.Humidity
In August, the average relative humidity is 70%.Rainfall
In Bellevue, in August, during 4.1 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Bellevue, during the entire year, the rain falls for 119.1 days and collects up to 11.97" (304mm) of precipitation.Snowfall
In Bellevue, snow does not fall in April through October.Daylight
In Bellevue, the average length of the day in August is 14h and 12min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:42 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:50 pm PDT.
Sunshine
August has the most sunshine of the year in Bellevue, with an average of 10.7h of sunshine.UV index
In Bellevue, the average daily maximum UV index in August is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In August, the average maximum UV index of 4 translates into the following recommendations:
Be vigilant - Preventing sunburn is recommended. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Bellevue, WA
- Average high temperature in August: 76.6°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in August: 53.4°F
The month with the highest average low temperature is August (53.4°F).
The coldest month (with the lowest average low temperature) is February (34.5°F).
Average pressure in August
Bellevue, WA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in August
Bellevue, WA
- Average wind speed in August: 3.4mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in August
Bellevue, WA
- Average humidity in August: 70%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in August
Bellevue, WA
- Average rainfall in August: 0.31"
The wettest month (with the highest rainfall) is December (2.01").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in August
Bellevue, WA
- Average rainfall days in August: 4.1 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in August
Bellevue, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Bellevue, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Bellevue, WA
- Average daylight in August: 14h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 10h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in August
Bellevue, WA
- Average sunshine days in August: 24.9 days
The month with the most sunshine days is August (24.9 days).
The month with the least sunshine days is February (13.8 days).
Average UV index in August
Bellevue, WA
- Average UV index in August: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Bellevue, WA
- Average cloud cover in August: 25
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in August
Bellevue, WA
- Average visibility in August: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
