August weather forecast and climate
Knoxville, AL

Weather in August

The last month of the summer, August, is also a hot month in Knoxville, Alabama, with average temperature fluctuating between 91.6°F (33.1°C) and 71.6°F (22°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still tropical 91.6°F (33.1°C). In Knoxville, the average low-temperature is 71.6°F (22°C).

Heat index

The average heat index in August is estimated at a life-threatening hot 113.2°F (45.1°C). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. With the 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 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, clothing, metabolic differences, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Knoxville, the average relative humidity is 73%.

Rainfall

In Knoxville, Alabama, during 19.4 rainfall days, 3.39" (86mm) of precipitation is typically accumulated. In Knoxville, during the entire year, the rain falls for 166.5 days and collects up to 39.41" (1001mm) of precipitation.

Snowfall

In Knoxville snow does not fall in March through November.

Daylight

The average length of the day in Knoxville is 13.3h.

Sunshine

In August, the average sunshine in Knoxville is 10.2h.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index in Knoxville. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the temperature in August in Knoxville?

In August, in Knoxville, Alabama, the average high-temperature is 91.6°F (33.1°C), and the average low-temperature is 71.6°F (22°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, in August is appraised at 113.2°F (45.1°C).

What is the average humidity in August in Knoxville?

The average relative humidity in August in Knoxville, Alabama, is 73%.

How many days does it rain in August in Knoxville?

In Knoxville, in August, during 19.4 rainfall days, 3.39" (86mm) of precipitation is typically accumulated.

When it does not snow in Knoxville?

In Knoxville snow does not fall in March through November.

What is the average length of the day in August in Knoxville?

In August, the average length of the day is 13.3h.

How long on average sun shines in August in Knoxville?

In Knoxville, the average sunshine in August is 10.2h.

When is the highest UV index in Knoxville?

June through August, with an average maximum UV index of 7, are months with the highest UV index in Knoxville, Alabama.

How high is the UV index in August in Knoxville?

In Knoxville, the average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in August
Knoxville, AL

Average temperature in August - Knoxville, AL
  • Average high temperature in August: 91.6°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in August: 71.6°F

Months with the highest average low temperature are July and August (71.6°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

[Resources]

Average pressure in August
Knoxville, AL

Average pressure in August - Knoxville, AL
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.97").

[Resources]

Average wind speed in August
Knoxville, AL

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

The windiest month (with the highest average wind speed) is February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

[Resources]

Average humidity in August
Knoxville, AL

Average humidity in August - Knoxville, AL
  • Average humidity in August: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (69%).

[Resources]

Average rainfall in August
Knoxville, AL

Average rainfall in August - Knoxville, AL
  • Average rainfall in August: 3.39"

The wettest month (with the highest rainfall) is April (4.29").
The driest month (with the least rainfall) is October (2.28").

[Resources]

Average rainfall days in August
Knoxville, AL

Average rainfall days in August - Knoxville, AL
  • Average rainfall days in August: 19.4 days

The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is November (8.5 days).

[Resources]

Average snowfall in August
Knoxville, AL

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

The month with the highest snowfall is January (0.55").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

[Resources]

Average snowfall days in August
Knoxville, AL

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

Months with the highest number of snowfall days are January and February (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in August /
Average sunshine in August
Knoxville, AL

Average daylight in August / Average sunshine in August - Knoxville, AL
  • Average daylight in August: 13.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in August: 10.2h

The month with the most sunshine is June (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

[Resources]

Average sunshine days in August
Knoxville, AL

Average sunshine days in August - Knoxville, AL
  • Average sunshine days in August: 9.9 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.8 days).

[Resources]

Average UV index in August
Knoxville, AL

Average UV index in August - Knoxville, AL
  • Average UV index in August: 7

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

[Resources]

Average cloud cover in August
Knoxville, AL

Average cloud cover in August - Knoxville, AL
  • Average cloud cover in August: 32

Months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 29).

[Resources]

Average visibility in August
Knoxville, AL

Average visibility in August - Knoxville, AL
  • Average visibility in August: 6mi

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

[Resources]