August weather forecast
Fort Smith, AR

Weather in August

August, the last month of the summer in Fort Smith, is another tropical month, with an average temperature fluctuating between 91.9°F (33.3°C) and 69.4°F (20.8°C).

Temperature

In August, the average high-temperature is almost the same as in July - a still hot 91.9°F (33.3°C). The average low-temperature, in August, is 69.4°F (20.8°C).

Heat index

The average heat index in August is estimated at a scorching 111.9°F (44.4°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 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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the 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

July and August, with an average relative humidity of 70%, are the least humid months in Fort Smith.

Rainfall

In Fort Smith, in August, during 13.1 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Fort Smith, Arkansas, during the entire year, the rain falls for 131.9 days and collects up to 25.51" (648mm) of precipitation.

Snowfall

In Fort Smith, Arkansas, snow does not fall in April through November.

Daylight

In Fort Smith, the average length of the day in August is 13h and 27min.
On the first day of August, sunrise is at 6:26 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:46 pm CDT.

Sunshine

In August, the average sunshine is 10.8h.

UV index

In August, the average daily maximum UV index in Fort Smith, Arkansas, is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Fort Smith?

The average high-temperature, in August, in Fort Smith, is 91.9°F (33.3°C), while the average low-temperature is 69.4°F (20.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 111.9°F (44.4°C).

What are the least humid months in Fort Smith?

July and August, with an average relative humidity of 70%, are the least humid months in Fort Smith, Arkansas.

What is the average humidity in August in Fort Smith?

In Fort Smith, the average relative humidity in August is 70%.

How much does it rain in Fort Smith in August?

In August, in Fort Smith, Arkansas, the rain falls for 13.1 days. Throughout August, 2.68" (68mm) of precipitation is accumulated.

When it does not snow in Fort Smith?

April through November are months without snowfall in Fort Smith.

What is the average length of the day in August in Fort Smith?

In August, the average day length in Fort Smith is 13h and 27min.

What time are sunrise and sunset in August in Fort Smith?

In August, on the first day of the month, sunrise is at 6:26 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 7:46 pm CDT.

How many hours of sunshine does Fort Smith have in August?

In Fort Smith, the average sunshine duration in August is 10.8h.

What is the UV index reading in August in Fort Smith?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Fort Smith, AR

Average temperature in August - Fort Smith, AR
  • Average high temperature in August: 91.9°F

The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is January (48°F).

  • Average low temperature in August: 69.4°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in August
Fort Smith, AR

Average pressure in August - Fort Smith, AR
  • Average pressure in August: 29.96"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Fort Smith, AR

Average wind speed in August - Fort Smith, AR
  • Average wind speed in August: 4.7mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

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Average humidity in August
Fort Smith, AR

Average humidity in August - Fort Smith, AR
  • Average humidity in August: 70%

The months with the highest relative humidity are March and May (77%).
The months with the lowest relative humidity are July and August (70%).

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Average rainfall in August
Fort Smith, AR

Average rainfall in August - Fort Smith, AR
  • Average rainfall in August: 2.68"

The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is February (1.34").

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Average rainfall days in August
Fort Smith, AR

Average rainfall days in August - Fort Smith, AR
  • Average rainfall days in August: 13.1 days

The month with the highest number of rainy days is April (14 days).
The month with the least rainy days is November (7.6 days).

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Average snowfall in August
Fort Smith, AR

Average snowfall in August - Fort Smith, AR
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
Fort Smith, AR

Average snowfall days in August - Fort Smith, AR
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Fort Smith, AR

Average daylight in August / Average sunshine in August - Fort Smith, AR
  • Average daylight in August: 13h and 27min

The month with the longest days is June (Average daylight: 14h and 31min).
The month with the shortest days is December (Average daylight: 9h and 49min).

  • Average sunshine in August: 10h and 48min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).

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Average sunshine days in August
Fort Smith, AR

Average sunshine days in August - Fort Smith, AR
  • Average sunshine days in August: 14.8 days

The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is April (14.2 days).

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Average UV index in August
Fort Smith, AR

Average UV index in August - Fort Smith, AR
  • Average UV index in August: 6

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in August
Fort Smith, AR

Average cloud cover in August - Fort Smith, AR
  • Average cloud cover in August: 24

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in August
Fort Smith, AR

Average visibility in August - Fort Smith, AR
  • Average visibility in August: 6mi

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

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