August weather forecast
The Dalles, OR

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Weather in August

In August, The Dalles experiences similar weather conditions to July, albeit with a slight dip in maximum temperatures to 81.3°F (27.4°C). The dry spell continues making August the second driest month of the year, receiving merely 0.28" (7mm) of rain averaging over 3.2 days. The prolonged daylight hours reward everyone an extended timeline to enjoy the great outdoors. This month's warm climate allows for a wide array of outdoor activities, from river cruises to scenic hikes.

Temperature

The transition into August notes an average high-temperature of a still moderately hot 81.3°F (27.4°C), revealing a mild distinction from the 81.7°F (27.6°C) in July. Despite a noticeable differential from daytime highs, The Dalles notes an average nighttime low-temperature of 55.8°F (13.2°C) in August.

Heat index

For most parts of August, the heat index is estimated at 82.4°F (28°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.

Humidity

July and August, with an average relative humidity of 51%, are the least humid months in The Dalles.

Rainfall

In The Dalles, Oregon, during August, the rain falls for 3.2 days and regularly aggregates up to 0.28" (7mm) of precipitation. In The Dalles, during the entire year, the rain falls for 133.5 days and collects up to 16.93" (430mm) of precipitation.

Snowfall

April through October are months without snowfall in The Dalles, Oregon.

Daylight

In August, the average length of the day is 14h and 4min.
On the first day of August, sunrise is at 5:49 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:43 pm PDT.

Sunshine

The average sunshine in August is 11.9h.

UV index

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 5 during August morphs into the following directions:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What are the temperatures in The Dalles in August?

The high-temperature in The Dalles during August is 81.3°F (27.4°C) and the low-temperature is 55.8°F (13.2°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 82.4°F (28°C).

What are the least humid months in The Dalles?

The months with the lowest humidity in The Dalles, Oregon, are July and August, with an average relative humidity of 51%.

What is the average humidity in August in The Dalles?

The average relative humidity in August in The Dalles is 51%.

How many days does it rain in August in The Dalles?

In August, in The Dalles, the rain falls for 3.2 days. Throughout August, 0.28" (7mm) of precipitation is accumulated.

When it does not snow in The Dalles?

April through October are months without snowfall.

What is the average length of the day in August in The Dalles?

The average day length in August in The Dalles, Oregon, is 14h and 4min.

When is the sunrise / sunset in August in The Dalles?

In August, on the first day of the month, sunrise is at 5:49 am and sunset at 8:32 pm. On the last day of the month, in The Dalles, sunrise is at 6:25 am and sunset at 7:43 pm PDT.

How many hours of sunshine does The Dalles have in August?

The average sunshine duration in August is 11.9h.

What is the UV index reading in August in The Dalles?

In The Dalles, 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 exposure to the Sun's UV radiation.
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
The Dalles, OR

Average temperature in August - The Dalles, OR
  • Average high temperature in August: 81.3°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 (37°F).

  • Average low temperature in August: 55.8°F

The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in August
The Dalles, OR

Average pressure in August - The Dalles, OR
  • Average pressure in August: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

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Average wind speed in August
The Dalles, OR

Average wind speed in August - The Dalles, OR
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).

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Average humidity in August
The Dalles, OR

Average humidity in August - The Dalles, OR
  • Average humidity in August: 51%

The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).

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Average rainfall in August
The Dalles, OR

Average rainfall in August - The Dalles, OR
  • Average rainfall in August: 0.28"

The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in August
The Dalles, OR

Average rainfall days in August - The Dalles, OR
  • Average rainfall days in August: 3.2 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).

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Average snowfall in August
The Dalles, OR

Average snowfall in August - The Dalles, OR
  • Average snowfall in August: 0"

The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
The Dalles, OR

Average snowfall days in August - The Dalles, OR
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
The Dalles, OR

Average daylight in August / Average sunshine in August - The Dalles, OR
  • Average daylight in August: 14h and 1min

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 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in August
The Dalles, OR

Average sunshine days in August - The Dalles, OR
  • Average sunshine days in August: 26.3 days

The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).

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Average UV index in August
The Dalles, OR

Average UV index in August - The Dalles, 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).

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Average cloud cover in August
The Dalles, OR

Average cloud cover in August - The Dalles, OR
  • Average cloud cover in August: 10

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in August
The Dalles, OR

Average visibility in August - The Dalles, OR
  • Average visibility in August: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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The Dalles, Oregon, USA

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