August weather forecast
Shelby, AL

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Weather in August

The last month of the summer, August, is another hot month in Shelby, Alabama, with an average temperature fluctuating between 90°F (32.2°C) and 70.5°F (21.4°C).

Temperature

The advent of August denotes an average high-temperature of a still tropical 90°F (32.2°C), subtly different from July's 90.1°F (32.3°C). An average minimum temperature of 70.5°F (21.4°C) marks the month of August.

Heat index

August's heat index is estimated at a blisteringly hot 109.4°F (43°C). Keep guard: Heat cramps and heat exhaustion are likely. Continued activity increases the risk of heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in August is 75%.

Rainfall

In Shelby, in August, during 19.9 rainfall days, 3.58" (91mm) of precipitation is typically accumulated. Throughout the year, there are 170.7 rainfall days, and 39.06" (992mm) of precipitation is accumulated.

Snowfall

In Shelby, snow does not fall in April through October.

Daylight

In August, the average length of the day in Shelby is 13h and 20min.
On the first day of August, sunrise is at 6:00 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:12 pm CDT.

Sunshine

In August, the average sunshine is 10.2h.

UV index

In Shelby, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 6 during August translates into the following directions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

How hot is it in Shelby in August?

Shelby in August has an average high-temperature of 90°F (32.2°C) and an average low-temperature of 70.5°F (21.4°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is estimated at 109.4°F (43°C).

What is the average humidity in August in Shelby?

The average relative humidity in August in Shelby is 75%.

How much does it rain in Shelby in August?

In Shelby, during August, the rain falls for 19.9 days and regularly aggregates up to 3.58" (91mm) of precipitation.

When it does not snow in Shelby?

April through October are months without snowfall.

How many hours of daylight does Shelby have in August?

In Shelby, Alabama, the average day length in August is 13h and 20min.

When is the sunrise / sunset in August in Shelby?

On the first day of August in Shelby, sunrise is at 6:00 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:12 pm CDT.

How long on average sun shines in August in Shelby?

The average sunshine duration in August is 10.2h.

What is the UV index reading in August in Shelby?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat 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
Shelby, AL

Average temperature in August - Shelby, AL
  • Average high temperature in August: 90°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in August: 70.5°F

The months with the highest average low temperature are July and August (70.5°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).

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Average pressure in August
Shelby, AL

Average pressure in August - Shelby, AL
  • Average pressure in August: 29.98"Hg

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

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Average wind speed in August
Shelby, AL

Average wind speed in August - Shelby, AL
  • Average wind speed in August: 4.3mph

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 (4.3mph).

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Average humidity in August
Shelby, AL

Average humidity in August - Shelby, AL
  • Average humidity in August: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Shelby, AL

Average rainfall in August - Shelby, AL
  • Average rainfall in August: 3.58"

The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in August
Shelby, AL

Average rainfall days in August - Shelby, AL
  • Average rainfall days in August: 19.9 days

The month with the highest number of rainy days is July (21.2 days).
The month with the least rainy days is November (7.9 days).

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Average snowfall in August
Shelby, AL

Average snowfall in August - Shelby, AL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.59").
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
Shelby, AL

Average snowfall days in August - Shelby, AL
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and February (1 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
Shelby, AL

Average daylight in August / Average sunshine in August - Shelby, 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 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

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Average sunshine days in August
Shelby, AL

Average sunshine days in August - Shelby, AL
  • Average sunshine days in August: 9.5 days

The months with the most sunshine days are October and November (20.4 days).
The month with the least sunshine days is July (7.8 days).

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Average UV index in August
Shelby, AL

Average UV index in August - Shelby, AL
  • Average UV index in August: 6

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
Shelby, AL

Average cloud cover in August - Shelby, AL
  • Average cloud cover in August: 33

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are September and October (Cloud cover 30).

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Average visibility in August
Shelby, AL

Average visibility in August - Shelby, 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).

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Shelby, Alabama, USA

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