Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Mount Vernon's warmest period falls in July and August, when the average high-temperatures ascend to 68.4°F (20.2°C).Humidity
In Mount Vernon, the average relative humidity in August is 77%.Rainfall
In Mount Vernon, Washington, in August, during 7.2 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Mount Vernon, during the entire year, the rain falls for 185.2 days and collects up to 34.72" (882mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in August is 14h and 16min.On the first day of the month, sunrise is at 5:45 am and sunset at 8:45 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:52 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 4 during August morphs into the following directions:
Take precautions - Protection against sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are the warmest months in Mount Vernon?
What are August temperatures in Mount Vernon?
What is the average humidity in August in Mount Vernon?
How much does it rain in Mount Vernon in August?
When it does not snow in Mount Vernon?
How many hours of daylight does Mount Vernon have in August?
When is the sunrise / sunset in August in Mount Vernon?
What are the months with the most sunshine in Mount Vernon?
How many hours of sunshine does Mount Vernon have in August?
How high is the UV index in August in Mount Vernon?
Average temperature in August
Mount Vernon, WA
- Average high temperature in August: 68.4°F
The warmest months (with the highest average high temperature) are July and August (68.4°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in August: 54.1°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is February (36.1°F).
Average pressure in August
Mount Vernon, WA
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in August
Mount Vernon, WA
- Average wind speed in August: 3.7mph
The windiest month (with the highest average wind speed) is November (7.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in August
Mount Vernon, WA
- Average humidity in August: 77%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is July (75%).
Average rainfall in August
Mount Vernon, WA
- Average rainfall in August: 0.98"
The wettest month (with the highest rainfall) is November (4.96").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in August
Mount Vernon, WA
- Average rainfall days in August: 7.2 days
The month with the highest number of rainy days is March (20.8 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in August
Mount Vernon, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Mount Vernon, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.6 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
Mount Vernon, WA
- Average daylight in August: 14h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in August: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in August
Mount Vernon, WA
- Average sunshine days in August: 22.3 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.1 days).
Average UV index in August
Mount Vernon, WA
- Average UV index in August: 4
The month with the highest UV index is 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
Mount Vernon, WA
- Average cloud cover in August: 26
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in August
Mount Vernon, WA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Mount Vernon, Washington, USA
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