August weather forecast
Chattanooga, TN

In Chattanooga, August continues with the established summer weather pattern. Despite slight dips in temperature compared to July, the city still experiences warm and sunny days. Despite the persistent summer heat, rainfall increases to reach 3.31" (84mm). As the month progresses towards September, the temperature begins to show signs of receding, preparing for the onset of autumn.

Temperature

The advent of August in Chattanooga presents an average high-temperature of a still hot 87.3°F (30.7°C), maintaining a close correlation with the preceding month. Chattanooga experiences a steady low-temperature of 66°F (18.9°C) throughout August.

Heat index

During August, the heat index is estimated at a fiery hot 100.4°F (38°C). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. 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 quite 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the lowest humidity in Chattanooga are June through August, October and November, with an average relative humidity of 75%.

Rainfall

In August, in Chattanooga, the rain falls for 17.6 days. Throughout August, 3.31" (84mm) of precipitation is accumulated. Throughout the year, there are 174.4 rainfall days, and 41.14" (1045mm) of precipitation is accumulated.

Snowfall

In Chattanooga, Tennessee, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 26min.
On the first day of August in Chattanooga, sunrise is at 6:51 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 8:08 pm EDT.

Sunshine

In Chattanooga, the average sunshine in August is 9.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily maximum UV index of 6 in August translates into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.