August weather forecast
Mountain Brook, AL

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Weather in August

In August, Mountain Brook experiences a slight dip in temperature, offering a gentle respite from July's heat. Nevertheless, the temperature remains high enough to maintain the summer's character. The month receives a significant amount of rainfall, nearly as much as observed in June with 1.89" (48mm). As people bask in the waning days of summer, the month maintains its lively atmosphere with outdoor picnics, hikes, and music festivals.

Temperature

Mountain Brook in August witnesses an average high-temperature of a still hot 90.1°F (32.3°C), indicating a slight variation from July's 91°F (32.8°C). Mountain Brook, in August, witnesses an average low-temperature of 70.9°F (21.6°C).

Heat index

August's heat index is estimated at a blisteringly hot 107.6°F (42°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In Mountain Brook, the average relative humidity in August is 72%.

Rainfall

In Mountain Brook, in August, it is raining for 15.7 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in Mountain Brook, there are 143.1 rainfall days, and 18.58" (472mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in August is 13h and 22min.
On the first day of August, sunrise is at 6:00 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:13 pm CDT.

Sunshine

In August, the average sunshine is 10.3h.

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 7 in August converts into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.

Frequently asked questions

How hot is it in August?

August temperatures vary between a high-temperature of 90.1°F (32.3°C) and a low-temperature of 70.9°F (21.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is estimated at 107.6°F (42°C).

What is the average humidity in August?

In August, the average relative humidity is 72%.

How many days does it rain in August?

In Mountain Brook, in August, during 15.7 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in August?

In Mountain Brook, the average day length in August is 13h and 22min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:00 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:13 pm CDT.

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

The average sunshine duration in August is 10.3h.

What are the months with the highest UV index?

The months with the highest UV index in Mountain Brook are July and August, with an average maximum UV index of 7.

How high is the UV index in August?

In August, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health risk 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
Mountain Brook, AL

Average temperature in August - Mountain Brook, AL
  • Average high temperature in August: 90.1°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (50.7°F).

  • Average low temperature in August: 70.9°F

The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in August
Mountain Brook, AL

Average pressure in August - Mountain Brook, AL
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in August
Mountain Brook, AL

Average wind speed in August - Mountain Brook, AL
  • Average wind speed in August: 4.5mph

The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in August
Mountain Brook, AL

Average humidity in August - Mountain Brook, AL
  • Average humidity in August: 72%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Mountain Brook, AL

Average rainfall in August - Mountain Brook, AL
  • Average rainfall in August: 1.89"

The wettest month (with the highest rainfall) is June (1.97").
The driest month (with the least rainfall) is November (1.02").

Average rainfall days in August
Mountain Brook, AL

Average rainfall days in August - Mountain Brook, AL
  • Average rainfall days in August: 15.7 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (7.9 days).

Average snowfall in August
Mountain Brook, AL

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

The month with the highest snowfall is January (0.12").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Mountain Brook, AL

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

The months with the highest number of snowfall days are January and February (0.8 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
Mountain Brook, AL

Average daylight in August / Average sunshine in August - Mountain Brook, AL
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in August
Mountain Brook, AL

Average sunshine days in August - Mountain Brook, AL
  • Average sunshine days in August: 12.3 days

The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is July (11.1 days).

Average UV index in August
Mountain Brook, AL

Average UV index in August - Mountain Brook, AL
  • Average UV index in August: 7

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in August
Mountain Brook, AL

Average cloud cover in August - Mountain Brook, AL
  • Average cloud cover in August: 31

The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in August
Mountain Brook, AL

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

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

Mountain Brook, Alabama, USA

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