August weather forecast
Mountain Brook, WA

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Weather in August

The last month of the summer, August, is also a moderately hot month in Mountain Brook, Washington, with an average temperature varying between 52.3°F (11.3°C) and 78.6°F (25.9°C).

Temperature

In Mountain Brook, August is the month with the highest recorded average temperatures, measuring a high of 78.6°F (25.9°C) and a low of 52.3°F (11.3°C).

Humidity

July and August, with an average relative humidity of 58%, are the least humid months.

Rainfall

In August, the rain falls for 3.8 days. Throughout August, 0.35" (9mm) of precipitation is accumulated. Throughout the year, in Mountain Brook, there are 152.5 rainfall days, and 26.93" (684mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Mountain Brook.

Daylight

In August, the average length of the day is 14h and 4min.
On the first day of the month, sunrise is at 5:49 am and sunset at 8:34 pm. On the last day of August, in Mountain Brook, sunrise is at 6:26 am and sunset at 7:44 pm PDT.

Sunshine

In August, the average sunshine in Mountain Brook is 11.7h.

UV index

In August, the average daily maximum UV index in Mountain Brook is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 5 during August leads to these advisories:
Prioritize safety - Recommendations to avert sunburn are shared. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the warmest month in Mountain Brook?

August, recording an average high temperature of 78.6°F (25.9°C) and a low temperature of 52.3°F (11.3°C), is Mountain Brook's warmest month.

What is the average August temperature in Mountain Brook?

In August, the average high-temperature and low-temperature in Mountain Brook are 78.6°F (25.9°C) and 52.3°F (11.3°C) respectively.

What are the least humid months in Mountain Brook?

The months with the lowest humidity in Mountain Brook are July and August, with an average relative humidity of 58%.

What is the average humidity in August in Mountain Brook?

In Mountain Brook, the average relative humidity in August is 58%.

How much does it rain in Mountain Brook in August?

In Mountain Brook, Washington, in August, during 3.8 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

When it does not snow in Mountain Brook?

In Mountain Brook, Washington, snow does not fall in May through October.

How many hours of daylight does Mountain Brook have in August?

The average day length in August in Mountain Brook is 14h and 4min.

When are sunrise and sunset in August in Mountain Brook?

On the first day of August in Mountain Brook, Washington, sunrise is at 5:49 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:44 pm PDT.

How many hours of sunshine does Mountain Brook have in August?

In August, the average sunshine duration in Mountain Brook, Washington, is 11.7h.

What is the UV index intensity in August in Mountain Brook?

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Mountain Brook, WA

Average temperature in August - Mountain Brook, WA
  • Average high temperature in August: 78.6°F

The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (35.2°F).

  • Average low temperature in August: 52.3°F

The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).

Average pressure in August
Mountain Brook, WA

Average pressure in August - Mountain Brook, WA
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).

Average wind speed in August
Mountain Brook, WA

Average wind speed in August - Mountain Brook, WA
  • Average wind speed in August: 5.6mph

The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).

Average humidity in August
Mountain Brook, WA

Average humidity in August - Mountain Brook, WA
  • Average humidity in August: 58%

The months with the highest relative humidity are January, February and December (88%).
The months with the lowest relative humidity are July and August (58%).

Average rainfall in August
Mountain Brook, WA

Average rainfall in August - Mountain Brook, WA
  • Average rainfall in August: 0.35"

The wettest month (with the highest rainfall) is January (4.88").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in August
Mountain Brook, WA

Average rainfall days in August - Mountain Brook, WA
  • Average rainfall days in August: 3.8 days

The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is August (3.8 days).

Average snowfall in August
Mountain Brook, WA

Average snowfall in August - Mountain Brook, WA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Mountain Brook, WA

Average snowfall days in August - Mountain Brook, WA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (6.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Mountain Brook, WA

Average daylight in August / Average sunshine in August - Mountain Brook, WA
  • 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: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in August
Mountain Brook, WA

Average sunshine days in August - Mountain Brook, WA
  • Average sunshine days in August: 24.8 days

The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is February (8.8 days).

Average UV index in August
Mountain Brook, WA

Average UV index in August - Mountain Brook, WA
  • 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 and February (UV index 1).

Average cloud cover in August
Mountain Brook, WA

Average cloud cover in August - Mountain Brook, WA
  • Average cloud cover in August: 15

The months with the most cloud cover are January and February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 15).

Average visibility in August
Mountain Brook, WA

Average visibility in August - Mountain Brook, WA
  • Average visibility in August: 6mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).

Mountain Brook, Washington, USA

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