August weather forecastTualatin, OR
August
Weather in August
In August, Tualatin swelters with temperatures soaring to a sizzling 82°F (27.8°C), marking the year’s hottest month. Despite the temperature, rainfall remains minimum, and cloud coverage lessens, making way for clear skies. Concurrently, the lowest relative humidity of the year ensures a considerable amount of heat during the day. As the summer season starts to wind down, the daylight duration and temperature peak begins to taper. Moving into September, anticipate the transition to milder weather, marked by cooler temperatures and a gradual increase in rainfall.Temperature
The warmest period in Tualatin is August, when temperatures fluctuate between an average high of 82°F (27.8°C) and a low of 55°F (12.8°C).Heat index
During August, the heat index is evaluated at 84.2°F (29°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Consider that heat index readings are for situations in the shade and light wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
With an average relative humidity of 63%, August is the least humid month.Rainfall
In August, the rain falls for 4.8 days. Throughout August, 0.35" (9mm) of precipitation is accumulated. In Tualatin, during the entire year, the rain falls for 170.9 days and collects up to 30.67" (779mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
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, sunrise is at 6:32 am and sunset at 7:49 pm PDT.
Sunshine
August has the most sunshine of the year in Tualatin, with an average of 11h of sunshine.UV index
The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In August, a regular UV index of 5 translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Tualatin, OR
- Average high temperature in August: 82°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in August: 55°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in August
Tualatin, OR
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in August
Tualatin, OR
- Average wind speed in August: 3.9mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in August
Tualatin, OR
- Average humidity in August: 63%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in August
Tualatin, OR
- Average rainfall in August: 0.35"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in August
Tualatin, OR
- Average rainfall days in August: 4.8 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in August
Tualatin, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Tualatin, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.3 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
Tualatin, 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 0min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in August
Tualatin, OR
- Average sunshine days in August: 24.2 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in August
Tualatin, 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
Tualatin, OR
- Average cloud cover in August: 22
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in August
Tualatin, 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).
