August weather forecast
Morristown, TN

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Weather in August

August in Morristown is still a summer delight with temperatures slightly cooling off to an average high of 85.5°F (29.7°C) from July. The city remains vibrant as summer activities are in full swing, with picnics, hikes, and festival events on the calendar. However, afternoons can still be fairly hot and humid, making air conditioning and shady spots popular. As August progresses, slightly cooler evenings add a touch of relief and whisper promises of the fall months ahead. Yet, the majority of the month is synonymous with summer holidays and the joy of warm weather.

Temperature

August's weather records an average high-temperature of a moderately hot 85.5°F (29.7°C), showing little deviation from July. Morristown registers a pronounced decline from daytime peak temperatures, averaging an enjoyable 62.6°F (17°C) lows in August.

Heat index

August's heat index is evaluated at a sweltering 95°F (35°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

August is the least humid month in Morristown, Tennessee, with an average relative humidity of 73%.

Rainfall

In Morristown, in August, it is raining for 15.7 days, with typically 1.93" (49mm) of accumulated precipitation. In Morristown, during the entire year, the rain falls for 172.1 days and collects up to 31.02" (788mm) of precipitation.

Snowfall

In Morristown, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 29min.
On the first day of the month, sunrise is at 6:40 am and sunset at 8:38 pm. On the last day of August, sunrise is at 7:04 am and sunset at 8:01 pm EDT.

Sunshine

In August, the average sunshine is 10.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 6 during August, leads to the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot in Morristown during August?

During August, Morristown experiences an average high-temperature of 85.5°F (29.7°C) and a low-temperature of 62.6°F (17°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 95°F (35°C).

What is the least humid month in Morristown?

With an average relative humidity of 73%, August is the least humid month.

What is the average humidity in August in Morristown?

In Morristown, Tennessee, the average relative humidity in August is 73%.

How many days does it rain in August in Morristown?

In Morristown, Tennessee, in August, during 15.7 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

When it does not snow in Morristown?

In Morristown, Tennessee, snow does not fall in May through September.

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

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

What time are sunrise and sunset in August in Morristown?

On the first day of August in Morristown, sunrise is at 6:40 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:01 pm EDT.

How many hours of sunshine does Morristown have in August?

In Morristown, the average sunshine duration in August is 10.4h.

What are the months with the highest UV index in Morristown?

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

What is the UV index intensity in August in Morristown?

The average daily maximum UV index in August in Morristown, Tennessee, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health 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
Morristown, TN

Average temperature in August - Morristown, TN
  • Average high temperature in August: 85.5°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (43.2°F).

  • Average low temperature in August: 62.6°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure in August
Morristown, TN

Average pressure in August - Morristown, TN
  • Average pressure in August: 30.02"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in August
Morristown, TN

Average wind speed in August - Morristown, TN
  • Average wind speed in August: 3.7mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

Average humidity in August
Morristown, TN

Average humidity in August - Morristown, TN
  • Average humidity in August: 73%

The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is August (73%).

Average rainfall in August
Morristown, TN

Average rainfall in August - Morristown, TN
  • Average rainfall in August: 1.93"

The wettest month (with the highest rainfall) is February (3.66").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days in August
Morristown, TN

Average rainfall days in August - Morristown, TN
  • Average rainfall days in August: 15.7 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (10.6 days).

Average snowfall in August
Morristown, TN

Average snowfall in August - Morristown, TN
  • Average snowfall in August: 0"

The month with the highest snowfall is December (2.83").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Morristown, TN

Average snowfall days in August - Morristown, TN
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Morristown, TN

Average daylight in August / Average sunshine in August - Morristown, 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 months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

Average sunshine days in August
Morristown, TN

Average sunshine days in August - Morristown, TN
  • Average sunshine days in August: 12.7 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is February (10.3 days).

Average UV index in August
Morristown, TN

Average UV index in August - Morristown, 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).

Average cloud cover in August
Morristown, TN

Average cloud cover in August - Morristown, TN
  • Average cloud cover in August: 27

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).

Average visibility in August
Morristown, TN

Average visibility in August - Morristown, TN
  • Average visibility in August: 6mi

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

Morristown, Tennessee, USA

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