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 marks the start of August with an average high-temperature of a still warm 81°F (27.2°C), hinting at a slight fluctuation from July's 81.7°F (27.6°C). Mount Vernon, during the nights of August, registers a substantial plunge from the daytime high, averaging at a chilly 49.6°F (9.8°C).Heat index
August's heat index is evaluated at 80.6°F (27°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The least humid month in Mount Vernon is August, with an average relative humidity of 42%.Rainfall
In August, in Mount Vernon, the rain falls for 3.3 days. Throughout August, 0.28" (7mm) of precipitation is accumulated. In Mount Vernon, during the entire year, the rain falls for 127.7 days and collects up to 17.09" (434mm) of precipitation.Snowfall
June through August are months without snowfall.Daylight
In August, the average length of the day is 13h and 58min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:21 pm. On the last day of August, in Mount Vernon, sunrise is at 6:19 am and sunset at 7:33 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 12.1h of sunshine.UV index
The average daily maximum UV index in August in Mount Vernon is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during August leads to these instructions:
Ensure safety - Sun damage prevention is strongly urged. To protect against the Sun's most potent rays, avoid direct exposure around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What is the usual temperature for Mount Vernon in August?
What is the least humid month 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?
Does it snow in Mount Vernon in August?
What is the average length of the day in August in Mount Vernon?
When is the sunrise / sunset in August in Mount Vernon?
What month has the most sunshine in Mount Vernon?
How long on average sun shines in August in Mount Vernon?
How high is the UV index in August in Mount Vernon?
Average temperature in August
Mount Vernon, OR
- Average high temperature in August: 81°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in August: 49.6°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in August
Mount Vernon, OR
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in August
Mount Vernon, OR
- Average wind speed in August: 5mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in August
Mount Vernon, OR
- Average humidity in August: 42%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in August
Mount Vernon, OR
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in August
Mount Vernon, OR
- Average rainfall days in August: 3.3 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in August
Mount Vernon, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Mount Vernon, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Mount Vernon, OR
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 12h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in August
Mount Vernon, OR
- Average sunshine days in August: 24.8 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in August
Mount Vernon, OR
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in August
Mount Vernon, OR
- Average cloud cover in August: 9
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in August
Mount Vernon, OR
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Mount Vernon, Oregon, USA
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