August weather forecast
Astoria, OR

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A scenic seaside shot of the city of Astoria in Oregon, with a view of the iconic Astoria Megler bridge crossing over the Columbia river
A scenic seaside shot of the city of Astoria in Oregon, with a view of the iconic Astoria Megler bridge crossing over the Columbia river

Weather in August

August in Astoria continues the familiar patterns of summer with warm days, low chances of rain, and plenty of sun. With temperature peaks in July, August temperature scales down marginally, offering wonderful late summer conditions. Ranging from temperatures of 53.1°F (11.7°C) to 67.6°F (19.8°C), August stands as the second warmest month in Astoria. Although the weather remains mostly sunny throughout August, local residents will be preparing for a gradual onset of cooler temperatures and rainfall as September approaches, marking the subtle commencement of autumn.

Temperature

Astoria witnesses the warmest weather in August, with temperatures averaging a high of 67.6°F (19.8°C) and a low of 53.1°F (11.7°C).

Humidity

In Astoria, the average relative humidity in August is 83%.

Rainfall

In Astoria, in August, it is raining for 7.2 days, with typically 0.55" (14mm) of accumulated precipitation. In Astoria, during the entire year, the rain falls for 192.7 days and collects up to 40.12" (1019mm) of precipitation.

Snowfall

April through November are months without snowfall.

Ocean temperature

In Astoria, in August, the average water temperature is 56.3°F (13.5°C).
Note: Staying in 56.3°F (13.5°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.

Daylight

The average length of the day in August is 14h and 6min.
On the first day of the month, sunrise is at 5:58 am and sunset at 8:44 pm. On the last day of August, sunrise is at 6:35 am and sunset at 7:55 pm PDT.

Sunshine

The month with the most sunshine is August, with an average of 9.9h of sunshine.

UV index

The average daily maximum UV index in August is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 4 in August, converts into the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.

Frequently asked questions

What time of the year is the hottest?

August, on average, is the warmest month, registering a high temperature of 67.6°F (19.8°C) and a low of 53.1°F (11.7°C).

What is the usual temperature for Astoria in August?

An average high-temperature, in August, in Astoria, is 67.6°F (19.8°C) and the average low-temperature is 53.1°F (11.7°C).

What is the average humidity in August?

The average relative humidity in August is 83%.

How much does it rain in August?

In Astoria, in August, during 7.2 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

When it does not snow?

In Astoria, snow does not fall in April through November.

What is the ocean temperature in August?

In Astoria, in August, the average water temperature is 56.3°F (13.5°C). Swimming in 56.3°F (13.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Astoria have in August?

In Astoria, Oregon, the average day length in August is 14h and 6min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:58 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:55 pm PDT.

What month has the most sunshine?

August has the most sunshine of the year, with an average of 9.9h of sunshine.

How many hours of sunshine does Astoria have in August?

The average sunshine duration in August in Astoria is 9.9h.

What is the UV index intensity in August?

The average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Astoria, OR

Average temperature in August - Astoria, OR
  • Average high temperature in August: 67.6°F

The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (45.1°F).

  • Average low temperature in August: 53.1°F

The month with the highest average low temperature is August (53.1°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).

Average pressure in August
Astoria, OR

Average pressure in August - Astoria, OR
  • Average pressure in August: 30.03"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).

Average wind speed in August
Astoria, OR

Average wind speed in August - Astoria, OR
  • Average wind speed in August: 5.3mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in August
Astoria, OR

Average humidity in August - Astoria, OR
  • Average humidity in August: 83%

The months with the highest relative humidity are January, February, March, November and December (84%).
The month with the lowest relative humidity is May (81%).

Average rainfall in August
Astoria, OR

Average rainfall in August - Astoria, OR
  • Average rainfall in August: 0.55"

The wettest month (with the highest rainfall) is December (6.42").
The driest month (with the least rainfall) is July (0.51").

Average rainfall days in August
Astoria, OR

Average rainfall days in August - Astoria, OR
  • Average rainfall days in August: 7.2 days

The month with the highest number of rainy days is December (21.2 days).
The month with the least rainy days is August (7.2 days).

Average snowfall in August
Astoria, OR

Average snowfall in August - Astoria, OR
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in August
Astoria, OR

Average snowfall days in August - Astoria, OR
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in August
Astoria, OR

Average sea temperature in August - Astoria, OR
  • Average sea temperature in August: 56.3°F

The best month for swimming (with the highest average sea temperature) is July (56.9°F).
The coldest month (with the lowest average sea temperature) is February (47.7°F).

Average daylight in August /
Average sunshine in August
Astoria, OR

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).

Average sunshine days in August
Astoria, OR

Average sunshine days in August - Astoria, OR
  • Average sunshine days in August: 20.1 days

The month with the most sunshine days is August (20.1 days).
The month with the least sunshine days is February (7.5 days).

Average UV index in August
Astoria, OR

Average UV index in August - Astoria, OR
  • Average UV index in August: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Astoria, OR

Average cloud cover in August - Astoria, OR
  • Average cloud cover in August: 36

The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in August
Astoria, OR

Average visibility in August - Astoria, OR
  • Average visibility in August: 5mi

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

Astoria, Oregon, USA

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