August weather forecast
Watertown, TN

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Weather in August

August, the last month of the summer in Watertown, is also a hot month, with an average temperature varying between 66.9°F (19.4°C) and 86.4°F (30.2°C).

Temperature

Stepping into August, Watertown records an average high-temperature of a still hot 86.4°F (30.2°C), almost consistent with July. In August, Watertown experiences a temperature dip to an average of 66.9°F (19.4°C) at night.

Heat index

During August, the heat index is estimated at a very hot 98.6°F (37°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in August is 76%.

Rainfall

In August, the rain falls for 19.1 days. Throughout August, 3.9" (99mm) of precipitation is accumulated. Throughout the year, there are 182.4 rainfall days, and 39.8" (1011mm) of precipitation is accumulated.

Snowfall

In Watertown, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 29min.
On the first day of the month, sunrise is at 5:52 am and sunset at 7:49 pm. On the last day of August, sunrise is at 6:16 am and sunset at 7:13 pm CDT.

Sunshine

The average sunshine in August is 10.4h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum high daily UV index of 6 during August translates into the following directions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is August?

August temperatures vary between a high-temperature of 86.4°F (30.2°C) and a low-temperature of 66.9°F (19.4°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 98.6°F (37°C).

What is the average humidity in August?

In Watertown, the average relative humidity in August is 76%.

How much does it rain in Watertown in August?

In Watertown, in August, during 19.1 rainfall days, 3.9" (99mm) of precipitation is typically accumulated.

When it does not snow?

In Watertown, snow does not fall in May through October.

How many hours of daylight does Watertown have in August?

In August, the average day length is 13h and 29min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:52 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:13 pm CDT.

How many hours of sunshine does Watertown have in August?

The average sunshine duration in August is 10.4h.

When is the highest UV index in Watertown?

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

How high is the UV index in August in Watertown?

In Watertown, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health 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
Watertown, TN

Average temperature in August - Watertown, TN
  • Average high temperature in August: 86.4°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (43.9°F).

  • Average low temperature in August: 66.9°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in August
Watertown, TN

Average pressure in August - Watertown, TN
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in August
Watertown, TN

Average wind speed in August - Watertown, TN
  • Average wind speed in August: 4.4mph

The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).

Average humidity in August
Watertown, TN

Average humidity in August - Watertown, TN
  • Average humidity in August: 76%

The months with the highest relative humidity are March and December (79%).
The months with the lowest relative humidity are October and November (75%).

Average rainfall in August
Watertown, TN

Average rainfall in August - Watertown, TN
  • Average rainfall in August: 3.9"

The wettest month (with the highest rainfall) is July (4.92").
The driest month (with the least rainfall) is November (2.24").

Average rainfall days in August
Watertown, TN

Average rainfall days in August - Watertown, TN
  • Average rainfall days in August: 19.1 days

The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (11 days).

Average snowfall in August
Watertown, TN

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

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

Average snowfall days in August
Watertown, TN

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

The month with the highest number of snowfall days is January (5.4 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
Watertown, TN

Average daylight in August / Average sunshine in August - Watertown, 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 48min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in August
Watertown, TN

Average sunshine days in August - Watertown, TN
  • Average sunshine days in August: 10 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (9.2 days).

Average UV index in August
Watertown, TN

Average UV index in August - Watertown, 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
Watertown, TN

Average cloud cover in August - Watertown, TN
  • Average cloud cover in August: 30

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).

Average visibility in August
Watertown, TN

Average visibility in August - Watertown, TN
  • 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).

Watertown, Tennessee, USA

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