August weather forecastPreston, WA
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Preston, Washington, with an average temperature varying between 48.7°F (9.3°C) and 74.8°F (23.8°C).Temperature
In Preston, temperatures reach their average annual highs in August, measuring 74.8°F (23.8°C) and a minimum average of 48.7°F (9.3°C).Humidity
In Preston, the average relative humidity in August is 72%.Rainfall
July and August are months with the least rain in Preston when the rain falls for 6.4 days and typically aggregates up to 0.59" (15mm) of rain.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in August is 14h and 12min.On the first day of the month, sunrise is at 5:46 am and sunset at 8:41 pm. On the last day of August, 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 10.6h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 during August translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Preston, WA
- Average high temperature in August: 74.8°F
The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (39.7°F).
- Average low temperature in August: 48.7°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (29.8°F).
Average pressure in August
Preston, WA
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in August
Preston, WA
- Average wind speed in August: 3.3mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in August
Preston, WA
- Average humidity in August: 72%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is July (71%).
Average rainfall in August
Preston, WA
- Average rainfall in August: 0.59"
The wettest month (with the highest rainfall) is January (6.1").
The driest months (with the least rainfall) are July and August (0.59").
Average rainfall days in August
Preston, WA
- Average rainfall days in August: 6.4 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in August
Preston, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Preston, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (5.4 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
Preston, 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 36min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in August
Preston, WA
- Average sunshine days in August: 21.9 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in August
Preston, WA
- Average UV index in August: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Preston, WA
- Average cloud cover in August: 28
The months with the most cloud cover are January, February, March and December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in August
Preston, WA
- Average visibility in August: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
