August weather forecast
Shelbyville, TN

Harboring the tail-end of summer, August in Shelbyville sees the continuation of warm temperatures, although a slight drop indicates the progressive approach of fall. The number of daylight hours starts to decrease gradually, hinting at the seasonal shift to come. Notably, the temperature doesn't differ much from July, with August heat reaching up to 86.5°F (30.3°C). Life continues in full swing under the extended daylight, with residents eager to make the most of the last summer days.

Temperature

The beginning of August records an average high-temperature of a still tropical 86.5°F (30.3°C), almost echoing the conditions of the previous month. Shelbyville records an average nighttime low-temperature of 67.1°F (19.5°C) throughout August.

Heat index

In August, the average heat index is calculated to be a torrid 100.4°F (38°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Shelbyville, the average relative humidity in August is 77%.

Rainfall

In Shelbyville, in August, during 17.3 rainfall days, 3.78" (96mm) of precipitation is typically accumulated. Throughout the year, there are 167.2 rainfall days, and 38.78" (985mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Shelbyville, the average length of the day in August is 13h and 28min.
On the first day of August in Shelbyville, Tennessee, sunrise is at 5:54 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:13 pm CDT.

Sunshine

In Shelbyville, the average sunshine in August is 9.9h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In August, the maximum UV index of 6 suggests this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.