August weather forecast
Tennessee, IL

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Weather in August

August, the last month of the summer in Tennessee, is another warm month, with an average temperature fluctuating between 82°F (27.8°C) and 63.7°F (17.6°C).

Temperature

The arrival of August sees an average high-temperature of a still moderately hot 82°F (27.8°C), hardly diverging from July's 82.6°F (28.1°C). During August, Tennessee's temperature averages to a refreshing 63.7°F (17.6°C) at night.

Heat index

August's average heat index is calculated to be a hot 87.8°F (31°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are highly critical to babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.

Humidity

In Tennessee, the average relative humidity in August is 79%.

Rainfall

In Tennessee, during August, the rain falls for 8.9 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Tennessee, Illinois, during the entire year, the rain falls for 94.4 days and collects up to 7.76" (197mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In August, the average length of the day is 13h and 44min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:36 pm CDT.

Sunshine

In Tennessee, the average sunshine in August is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What is the temperature in August in Tennessee?

The average high-temperature and low-temperature during August are 82°F (27.8°C) and 63.7°F (17.6°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in August in Tennessee?

In Tennessee, the average relative humidity in August is 79%.

How much does it rain in Tennessee in August?

In Tennessee, Illinois, in August, it is raining for 8.9 days, with typically 0.59" (15mm) of accumulated precipitation.

When it does not snow in Tennessee?

May through September are months without snowfall in Tennessee.

How many hours of daylight does Tennessee have in August?

The average day length in August is 13h and 44min.

When is the sunrise / sunset in August in Tennessee?

On the first day of August in Tennessee, Illinois, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:36 pm CDT.

How many hours of sunshine does Tennessee have in August?

The average sunshine duration in August is 10.1h.

What is the month with the highest UV index in Tennessee?

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

How high is the UV index in August in Tennessee?

In Tennessee, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat from 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
Tennessee, IL

Average temperature in August - Tennessee, IL
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in August: 63.7°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).

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Average pressure in August
Tennessee, IL

Average pressure in August - Tennessee, IL
  • 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 June (29.9"Hg).

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Average wind speed in August
Tennessee, IL

Average wind speed in August - Tennessee, IL
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in August
Tennessee, IL

Average humidity in August - Tennessee, IL
  • Average humidity in August: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in August
Tennessee, IL

Average rainfall in August - Tennessee, IL
  • Average rainfall in August: 0.59"

The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is December (0.35").

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Average rainfall days in August
Tennessee, IL

Average rainfall days in August - Tennessee, IL
  • Average rainfall days in August: 8.9 days

The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is January (3.3 days).

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Average snowfall in August
Tennessee, IL

Average snowfall in August - Tennessee, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Tennessee, IL

Average snowfall days in August - Tennessee, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.3 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
Tennessee, IL

Average daylight in August / Average sunshine in August - Tennessee, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 10h and 1min

The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in August
Tennessee, IL

Average sunshine days in August - Tennessee, IL
  • Average sunshine days in August: 18.2 days

The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is June (13.9 days).

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Average UV index in August
Tennessee, IL

Average UV index in August - Tennessee, IL
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in August
Tennessee, IL

Average cloud cover in August - Tennessee, IL
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in August
Tennessee, IL

Average visibility in August - Tennessee, IL
  • 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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Tennessee, Illinois, USA

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