August weather forecast
Fort Smith, AR

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Weather in August

As August begins, there is a feeling of the summer starting to wind down. Even though the weather is still warm, the city of Fort Smith prepares for a slow transition into autumn, especially towards the end of the month. Community gatherings, baseball games, and swimming still hold sway over the weekends. The summer sunshine continues to blaze with the temperature regime fluctuating from 69.4°F to 91.9°F. Coordinating outdoor activities in the early morning or evening assists in avoiding the intense, midday sun.

Temperature

Fort Smith experiences a recorded average high-temperature of a still tropical 91.9°F in August, closely aligned with July's 93.4°F. Significant dips from daytime highs mark the August nights, with a consistent average temperature of 69.4°F.

Heat index

During August, the heat index is computed to be a scorching 111.2°F. Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of 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 remain especially vital for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The months with the lowest humidity are July and August, with an average relative humidity of 70%.

Rainfall

In Fort Smith, during August, the rain falls for 13.1 days and regularly aggregates up to 2.68" of precipitation. Throughout the year, in Fort Smith, there are 131.9 rainfall days, and 25.51" of precipitation is accumulated.

Snowfall

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

Daylight

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

Sunshine

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

UV index

The average daily maximum UV index in August in Fort Smith is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 6 in August suggests the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. 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. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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FAQ

How hot does it get in Fort Smith in August?

Fort Smith in August has an average high-temperature of 91.9°F and an average low-temperature of 69.4°F. In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 111.2°F.

What are the least humid months in Fort Smith?

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

What is the average humidity in August in Fort Smith?

In August, the average relative humidity is 70%.

How much does it rain in Fort Smith in August?

In Fort Smith, in August, it is raining for 13.1 days, with typically 2.68" of accumulated precipitation.

When it does not snow in Fort Smith?

April through November are months without snowfall in Fort Smith, Arkansas.

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

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

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

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

In Fort Smith, Arkansas, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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
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 3min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in August: 10h and 5min

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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Fort Smith, Arkansas, USA

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