August weather forecastSammamish, WA
August
Weather in August
Continuing the summer trend from July, August in Sammamish is characterized by warm weather conditions, with minimal variation in the maximum recorded temperature. The amount of rainfall further dips to just 0.35" (9mm), tying with July for the least amount in any month. The reduced humidity, observed in the previous month, remains constant, reinforcing the hold of summer. Despite shortened daylight hours compared to July, August still offers a fascinating mix of warm days and cool evenings. In addition, increased visibility of around 6 miles enhances the delight of sightseeing in the city.Temperature
Sammamish experiences its highest average temperatures in August, reaching a peak of 76.5°F (24.7°C) and a minimum of 52.2°F (11.2°C).Humidity
In August, the average relative humidity is 71%.Rainfall
The months with the least rainfall are July and August Rain falls for 5.2 days and accumulates 0.35" (9mm) of rain.Snowfall
In Sammamish, snow does not fall in May through October.Daylight
In August, the average length of the day in Sammamish is 14h and 13min.On the first day of August, sunrise is at 5:46 am and sunset at 8:42 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:49 pm PDT.
Sunshine
August has the most sunshine of the year, with an average of 10.7h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: During August, 4 as the daily maximum UV index converts into the following advice:
Guard yourself - Avoiding sunburn is suggested. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sammamish, WA
- Average high temperature in August: 76.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in August: 52.2°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in August
Sammamish, 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
Sammamish, WA
- Average wind speed in August: 3.4mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in August
Sammamish, WA
- Average humidity in August: 71%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).
Average rainfall in August
Sammamish, WA
- Average rainfall in August: 0.35"
The wettest month (with the highest rainfall) is December (1.85").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in August
Sammamish, WA
- Average rainfall days in August: 5.2 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in August
Sammamish, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Sammamish, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in August /
Average sunshine in August
Sammamish, 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 months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in August
Sammamish, WA
- Average sunshine days in August: 24 days
The month with the most sunshine days is August (24 days).
The month with the least sunshine days is November (13.5 days).
Average UV index in August
Sammamish, WA
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Sammamish, WA
- Average cloud cover in August: 26
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in August
Sammamish, WA
- Average visibility in August: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
