August weather forecast
Sun Valley, TN

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Weather in August

August, the last month of the summer in Sun Valley, is another hot month, with an average temperature fluctuating between 64.4°F (18°C) and 86.2°F (30.1°C).

Temperature

In August, Sun Valley notes an average high-temperature of a still hot 86.2°F (30.1°C), hardly different from the preceding month. Sun Valley reports a sharp reduction in temperature during August, averaging at an enjoyable 64.4°F (18°C) at night.

Heat index

In August, the heat index is estimated at a very hot 98.6°F (37°C). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Sun Valley, the average relative humidity in August is 77%.

Rainfall

In Sun Valley, in August, it is raining for 16.9 days, with typically 3.07" (78mm) of accumulated precipitation. In Sun Valley, during the entire year, the rain falls for 173.9 days and collects up to 38.31" (973mm) of precipitation.

Snowfall

In Sun Valley, snow does not fall in May through October.

Daylight

In Sun Valley, the average length of the day in August is 13h and 29min.
On the first day of August, sunrise is at 5:49 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:10 pm CDT.

Sunshine

In Sun Valley, the average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Sun Valley. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during August translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

How hot is it in Sun Valley in August?

During August, Sun Valley experiences an average high-temperature of 86.2°F (30.1°C) and a low-temperature of 64.4°F (18°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 98.6°F (37°C).

What is the average humidity in August in Sun Valley?

The average relative humidity in August in Sun Valley, Tennessee, is 77%.

How much does it rain in Sun Valley in August?

In Sun Valley, Tennessee, in August, during 16.9 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

When it does not snow in Sun Valley?

In Sun Valley, snow does not fall in May through October.

How many hours of daylight does Sun Valley have in August?

The average day length in August in Sun Valley is 13h and 29min.

When is the sunrise / sunset in August in Sun Valley?

On the first day of August in Sun Valley, Tennessee, sunrise is at 5:49 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:10 pm CDT.

How long on average sun shines in August in Sun Valley?

In August, the average sunshine duration is 10.3h.

When is the highest UV index in Sun Valley?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Sun Valley, Tennessee.

How high is the UV index in August in Sun Valley?

The average daily maximum UV index in August in Sun Valley is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Sun Valley, TN

Average temperature in August - Sun Valley, TN
  • Average high temperature in August: 86.2°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (43.5°F).

  • Average low temperature in August: 64.4°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).

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Average pressure in August
Sun Valley, TN

Average pressure in August - Sun Valley, TN
  • Average pressure in August: 30"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in August
Sun Valley, TN

Average wind speed in August - Sun Valley, TN
  • Average wind speed in August: 4.3mph

The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

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Average humidity in August
Sun Valley, TN

Average humidity in August - Sun Valley, TN
  • Average humidity in August: 77%

The months with the highest relative humidity are February, March and December (79%).
The month with the lowest relative humidity is November (75%).

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Average rainfall in August
Sun Valley, TN

Average rainfall in August - Sun Valley, TN
  • Average rainfall in August: 3.07"

The wettest month (with the highest rainfall) is February (4.09").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in August
Sun Valley, TN

Average rainfall days in August - Sun Valley, TN
  • Average rainfall days in August: 16.9 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is November (10.8 days).

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Average snowfall in August
Sun Valley, TN

Average snowfall in August - Sun Valley, TN
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Sun Valley, TN

Average snowfall days in August - Sun Valley, TN
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.6 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
Sun Valley, TN

Average daylight in August / Average sunshine in August - Sun Valley, TN
  • Average daylight in August: 13h and 3min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

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Average sunshine days in August
Sun Valley, TN

Average sunshine days in August - Sun Valley, TN
  • Average sunshine days in August: 11.8 days

The month with the most sunshine days is October (18.2 days).
The months with the least sunshine days are February and July (11.3 days).

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Average UV index in August
Sun Valley, TN

Average UV index in August - Sun Valley, 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
Sun Valley, TN

Average cloud cover in August - Sun Valley, TN
  • Average cloud cover in August: 31

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in August
Sun Valley, TN

Average visibility in August - Sun Valley, TN
  • Average visibility in August: 5mi

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

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Sun Valley, Tennessee, USA

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