August weather forecast
Signal Mountain, TN

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Weather in August

The last month of the summer, August, is another hot month in Signal Mountain, Tennessee, with an average temperature varying between 86.5°F (30.3°C) and 65.8°F (18.8°C).

Temperature

Entering August, Signal Mountain's average high-temperature reads a still tropical 86.5°F (30.3°C), indicating a close resemblance to the previous month's climate. During August, the nighttime temperature averages to a refreshing 65.8°F (18.8°C).

Heat index

The average heat index in August is calculated to be a torrid 98.6°F (37°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The months with the lowest humidity are June through November, with an average relative humidity of 76%.

Rainfall

In Signal Mountain, in August, it is raining for 19.2 days, with typically 3.74" (95mm) of accumulated precipitation. In Signal Mountain, during the entire year, the rain falls for 187.2 days and collects up to 44.09" (1120mm) of precipitation.

Snowfall

May through October are months without snowfall in Signal Mountain.

Daylight

The average length of the day in August in Signal Mountain is 13h and 26min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:44 pm. On the last day of August, in Signal Mountain, sunrise is at 7:13 am and sunset at 8:09 pm EDT.

Sunshine

In Signal Mountain, the average sunshine in August is 9.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Signal Mountain. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

How hot is August in Signal Mountain?

In August, in Signal Mountain, the average high-temperature is 86.5°F (30.3°C), and the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is calculated to be 98.6°F (37°C).

What are the least humid months in Signal Mountain?

The months with the lowest humidity are June through November, with an average relative humidity of 76%.

What is the average humidity in August in Signal Mountain?

The average relative humidity in August in Signal Mountain, Tennessee, is 76%.

How much does it rain in Signal Mountain in August?

In August, in Signal Mountain, the rain falls for 19.2 days. Throughout August, 3.74" (95mm) of precipitation is accumulated.

When it does not snow in Signal Mountain?

May through October are months without snowfall in Signal Mountain, Tennessee.

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

In August, the average day length in Signal Mountain, Tennessee, is 13h and 26min.

When are sunrise and sunset in August in Signal Mountain?

In August, on the first day of the month, sunrise is at 6:51 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 8:09 pm EDT.

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

In Signal Mountain, Tennessee, the average sunshine duration in August is 9.3h.

When is the highest UV index in Signal Mountain?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index reading in August in Signal Mountain?

In Signal Mountain, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health threat 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
Signal Mountain, TN

Average temperature in August - Signal Mountain, TN
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (45.1°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in August
Signal Mountain, TN

Average pressure in August - Signal Mountain, TN
  • Average pressure in August: 30"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).

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Average wind speed in August
Signal Mountain, TN

Average wind speed in August - Signal Mountain, TN
  • Average wind speed in August: 3.8mph

The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

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Average humidity in August
Signal Mountain, TN

Average humidity in August - Signal Mountain, TN
  • Average humidity in August: 76%

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are June, July, August, September, October and November (76%).

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Average rainfall in August
Signal Mountain, TN

Average rainfall in August - Signal Mountain, TN
  • Average rainfall in August: 3.74"

The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is September (2.76").

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Average rainfall days in August
Signal Mountain, TN

Average rainfall days in August - Signal Mountain, TN
  • Average rainfall days in August: 19.2 days

The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is November (10.5 days).

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Average snowfall in August
Signal Mountain, TN

Average snowfall in August - Signal Mountain, TN
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Signal Mountain, TN

Average snowfall days in August - Signal Mountain, TN
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Signal Mountain, TN

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

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in August: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

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Average sunshine days in August
Signal Mountain, TN

Average sunshine days in August - Signal Mountain, TN
  • Average sunshine days in August: 10.1 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (7.7 days).

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Average UV index in August
Signal Mountain, TN

Average UV index in August - Signal Mountain, TN
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in August
Signal Mountain, TN

Average cloud cover in August - Signal Mountain, TN
  • Average cloud cover in August: 33

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 31).

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Average visibility in August
Signal Mountain, TN

Average visibility in August - Signal Mountain, TN
  • Average visibility in August: 5mi

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

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Signal Mountain, Tennessee, USA

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