August weather forecast
Rolla, MO

August continues with the prevailing hot weather pattern, although the heat gradually wanes as the month progresses. The longer days and lesser cloud coverage also contribute to the prevailing high temperatures. However, by the end of the month, the impending transition to fall can be felt in the air as daylight hours begin to shorten. The outdoor activities enjoyed in the summer months continue, although with a slight dip in temperature to 87.3°F (30.7°C) as compared to July.

Temperature

With the start of August, Rolla measures an average high-temperature of a still hot 87.3°F (30.7°C), not significantly differing from July's 89.1°F (31.7°C). In August, Rolla records an average nighttime temperature of 65.8°F (18.8°C).

Heat index

During August, the heat index is appraised at a torrid 100.4°F (38°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In August, the average relative humidity is 74%.

Rainfall

In Rolla, in August, it is raining for 15.2 days, with typically 2.68" (68mm) of accumulated precipitation. In Rolla, during the entire year, the rain falls for 147.2 days and collects up to 31.02" (788mm) of precipitation.

Snowfall

In Rolla, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 35min.
On the first day of the month, sunrise is at 6:10 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:36 am and sunset at 7:37 pm CDT.

Sunshine

In August, the average sunshine is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in August interprets into the following advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.