August weather forecast
Fort Smith, AR

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.