August weather forecast
Webster Groves, MO

Weather in August in Webster Groves, Missouri, often mirrors that of July's condition. The city experiences a slight decline in average temperatures but the weather largely remains steady. August signals the fading phase of summer, though locals continue to lean on their air conditioning and pool visits. Towards the end of the month, children prepare for school and outdoor activities may see a slight dip. The August climate helps conclude the active summer schedule and readies residents to transition into the briefer, cooler days of fall.

Temperature

Webster Groves's transition from July to August introduces an average high-temperature of a moderately hot 85.5°F (29.7°C), marking an insignificant variation from the 86.9°F (30.5°C). Webster Groves observes an average low-temperature of 67.1°F (19.5°C) during August nights.

Heat index

The heat index for August is calculated to be a fiery hot 95°F (35°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In August, the average relative humidity is 75%.

Rainfall

In Webster Groves, in August, it is raining for 14.2 days, with typically 3.31" (84mm) of accumulated precipitation. In Webster Groves, during the entire year, the rain falls for 144.8 days and collects up to 30.59" (777mm) of precipitation.

Snowfall

In Webster Groves, snow does not fall in April through October.

Daylight

In August, the average length of the day is 13h and 37min.
On the first day of August, sunrise is at 6:03 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:32 pm CDT.

Sunshine

In Webster Groves, the average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Webster Groves. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In August, an average UV index of 6 transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Boost your sun resistance with garments that are densely woven yet spacious.