August weather forecast
Coos Bay, OR

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A unique sandy and rocky shore near a forest of pine trees in the Shore Acres State Park in Coos Bay, Oregon
A unique sandy and rocky shore near a forest of pine trees in the Shore Acres State Park in Coos Bay, Oregon

Weather in August

The last summer month of August in Coos Bay sees mild changes in the weather. The rainfall takes a slight upward turn to 0.28" (7mm), yet the atmosphere remains predominantly dry. Slight changes in wind patterns accompany shifts in temperatures, hinting at autumn’s imminent arrival. The city continues to soak in ample sunshine during the lengthening daylight hours. Overall, August bids adieu to summer while creating anticipation for the onset of autumn.

Temperature

August is the warmest month of the year in Coos Bay, registering average temperatures as high as 66.9°F (19.4°C) and as low as 52.3°F (11.3°C).

Humidity

February and August, with an average relative humidity of 84%, are the most humid months.

Rainfall

In Coos Bay, during August, the rain falls for 3.5 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 153 rainfall days, and 33.5" (851mm) of precipitation is accumulated.

Snowfall

In Coos Bay, snow does not fall in March through October and December.

Daylight

In Coos Bay, Oregon, the average length of the day in August is 13h and 54min.
On the first day of the month, sunrise is at 6:07 am and sunset at 8:38 pm. On the last day of August, in Coos Bay, sunrise is at 6:40 am and sunset at 7:53 pm PDT.

Sunshine

In August, the average sunshine is 10.7h.

UV index

In Coos Bay, the average daily maximum UV index in August is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In August, the maximum UV index of 4 suggests this advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Updated: Feb 13, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the warmest month in Coos Bay?

Coos Bay's temperatures tend to reach their peak averages in August, with a high of 66.9°F (19.4°C) and a low of 52.3°F (11.3°C).

What are August temperatures in Coos Bay?

In Coos Bay, 66.9°F (19.4°C) is the average high-temperature and 52.3°F (11.3°C) is the average low-temperature during August.

What are the most humid months in Coos Bay?

February and August, with an average relative humidity of 84%, are most humid months in Coos Bay, Oregon.

What is the average humidity in August in Coos Bay?

The average relative humidity in August is 84%.

How much does it rain in Coos Bay in August?

In August, the rain falls for 3.5 days. Throughout August, 0.28" (7mm) of precipitation is accumulated.

When it does not snow in Coos Bay?

In Coos Bay, Oregon, snow does not fall in March through October and December.

How many hours of daylight does Coos Bay have in August?

The average day length in August is 13h and 54min.

When are sunrise and sunset in August in Coos Bay?

In August, on the first day of the month, sunrise is at 6:07 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 7:53 pm PDT.

How long on average sun shines in August in Coos Bay?

In Coos Bay, Oregon, the average sunshine duration in August is 10.7h.

How high is the UV index in August in Coos Bay?

In Coos Bay, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to 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
Coos Bay, OR

Average temperature in August - Coos Bay, OR
  • Average high temperature in August: 66.9°F

The warmest month (with the highest average high temperature) is August (66.9°F).
The month with the lowest average high temperature is December (49.1°F).

  • Average low temperature in August: 52.3°F

The month with the highest average low temperature is August (52.3°F).
The coldest months (with the lowest average low temperature) are February and December (41.7°F).

Average pressure in August
Coos Bay, OR

Average pressure in August - Coos Bay, OR
  • Average pressure in August: 30.02"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is September (30.01"Hg).

Average wind speed in August
Coos Bay, OR

Average wind speed in August - Coos Bay, OR
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in August
Coos Bay, OR

Average humidity in August - Coos Bay, OR
  • Average humidity in August: 84%

The months with the highest relative humidity are February and August (84%).
The months with the lowest relative humidity are April and October (81%).

Average rainfall in August
Coos Bay, OR

Average rainfall in August - Coos Bay, OR
  • Average rainfall in August: 0.28"

The wettest month (with the highest rainfall) is December (5.87").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in August
Coos Bay, OR

Average rainfall days in August - Coos Bay, OR
  • Average rainfall days in August: 3.5 days

The month with the highest number of rainy days is March (19.2 days).
The month with the least rainy days is August (3.5 days).

Average snowfall in August
Coos Bay, OR

Average snowfall in August - Coos Bay, OR
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").

Average snowfall days in August
Coos Bay, OR

Average snowfall days in August - Coos Bay, OR
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Coos Bay, OR

Average daylight in August / Average sunshine in August - Coos Bay, OR
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in August: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and February (Average sunshine: 4h and 24min).

Average sunshine days in August
Coos Bay, OR

Average sunshine days in August - Coos Bay, OR
  • Average sunshine days in August: 25.4 days

The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (9.7 days).

Average UV index in August
Coos Bay, OR

Average UV index in August - Coos Bay, 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 February and December (UV index 2).

Average cloud cover in August
Coos Bay, OR

Average cloud cover in August - Coos Bay, OR
  • Average cloud cover in August: 29

The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and September (Cloud cover 28).

Average visibility in August
Coos Bay, OR

Average visibility in August - Coos Bay, OR
  • Average visibility in August: 5mi

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

Coos Bay, Oregon, USA

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