August weather forecast
Tualatin, OR

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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

Tualatin's August weather reaches an average high of 82°F (27.8°C) and an average low of 55°F (12.8°C), making it the warmest month.

Heat index

The heat index value for August is calculated to be 84.2°F (29°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

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

In Tualatin, snow does not fall in April through October.

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, in Tualatin, 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 11h of sunshine.

UV index

In Tualatin, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 5 translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.

Frequently asked questions

What month is the hottest?

In Tualatin, August is the warmest month, with temperatures averaging a high of 82°F (27.8°C) and a low of 55°F (12.8°C).

What is the temperature in August?

August temperatures vary between a high-temperature of 82°F (27.8°C) and a low-temperature of 55°F (12.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 84.2°F (29°C).

What is the least humid month?

With an average relative humidity of 63%, August is the least humid month.

What is the average humidity in August?

The average relative humidity in August in Tualatin is 63%.

How much does it rain in August?

In Tualatin, in August, it is raining for 4.8 days, with typically 0.35" (9mm) of accumulated precipitation.

When it does not snow?

In Tualatin, snow does not fall in April through October.

How many hours of daylight does Tualatin have in August?

In Tualatin, the average day length in August is 14h and 2min.

When are sunrise and sunset in August?

On the first day of August, sunrise is at 5:56 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:49 pm PDT.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 11h of sunshine.

How long on average sun shines in August?

In Tualatin, the average sunshine duration in August is 11h.

What is the UV index intensity in August?

The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Tualatin, OR

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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).

Tualatin, Oregon, USA

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