August weather forecastWilsonville, OR
August
Weather in August
August, being the heart of summer, sustains high temperatures similar to July but with an incremental decrease. Despite being a torrid month, the scenery of Wilsonville thrives under bountiful sunshine. Even though there is no notable flip in the weather pattern, August records the highest wind gust speed of 5.8mph (9.3km/h). It can be inferred that the presence of increased wind speed might help cool down the otherwise sweltering climate. With the cloud cover at its minimum, star-gazing makes for an exciting night activity.Temperature
Temperature readings reach their annual highs in August, averaging 81°F (27.2°C) and a minimum average of 54°F (12.2°C).Heat index
The heat index value during August is evaluated at 84.2°F (29°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Heat index determinations are made taking into account the shade and light air movements. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
With an average relative humidity of 65%, August is the least humid month in Wilsonville.Rainfall
July and August are months with the least rain when the rain falls for 4.4 days and typically aggregates up to 0.31" (8mm) of rain.Snowfall
April through October are months without snowfall.Daylight
In Wilsonville, the average length of the day in August is 14h and 2min.On the first day of the month, sunrise is at 5:56 am and sunset at 8:38 pm. On the last day of August, in Wilsonville, sunrise is at 6:32 am and sunset at 7:49 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 11.1h of sunshine.UV index
The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Wilsonville, OR
- Average high temperature in August: 81°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in August: 54°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in August
Wilsonville, OR
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in August
Wilsonville, OR
- Average wind speed in August: 3.8mph
The windiest months (with the highest average wind speed) are January and February (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in August
Wilsonville, OR
- Average humidity in August: 65%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is August (65%).
Average rainfall in August
Wilsonville, OR
- Average rainfall in August: 0.31"
The wettest month (with the highest rainfall) is December (4.49").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in August
Wilsonville, OR
- Average rainfall days in August: 4.4 days
The month with the highest number of rainy days is March (20.9 days).
The months with the least rainy days are July and August (4.4 days).
Average snowfall in August
Wilsonville, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Wilsonville, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Wilsonville, OR
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in August: 11h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in August
Wilsonville, OR
- Average sunshine days in August: 24.6 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in August
Wilsonville, 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, November and December (UV index 2).
Average cloud cover in August
Wilsonville, OR
- Average cloud cover in August: 21
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in August
Wilsonville, OR
- Average visibility in August: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
