August weather forecastVermillion, SD
August
Weather in August
As August rolls in, the peak summer heat begins to ease off in Vermillion. The weather remains predominantly warm, with a noticeably higher humidity level than the previous months. Residents usually plan their outdoors around the high UV index, indicating that the sun is still potent despite the slight reduction in temperature. Afternoon wind gusts become frequent, bringing brief respite from the heat. August is the last full-on summer month, extending residents the opportunity to make the most of the warm days before Fall creeps in.Temperature
The average high-temperature is a still moderately hot 82.4°F (28°C) in August, hardly different from the 84.4°F (29.1°C) recorded in July. During the nights in August, Vermillion experiences a consistent average temperature of 61.3°F (16.3°C).Heat index
For most parts of August, the heat index is computed to be a tropical 87.8°F (31°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.One should consider that heat index numbers are for shaded settings and light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
The average relative humidity in August is 73%.Rainfall
In August, the rain falls for 13.7 days. Throughout August, 2.24" (57mm) of precipitation is accumulated. In Vermillion, during the entire year, the rain falls for 116.6 days and collects up to 21.26" (540mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Vermillion, the average length of the day in August is 13h and 52min.On the first day of August, sunrise is at 6:20 am and sunset at 8:47 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 8:03 pm CDT.
Sunshine
The average sunshine in August is 10.1h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the maximum UV index of 6 suggests this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Vermillion, SD
- Average high temperature in August: 82.4°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in August: 61.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in August
Vermillion, SD
- Average pressure in August: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in August
Vermillion, SD
- Average wind speed in August: 8.1mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in August
Vermillion, SD
- Average humidity in August: 73%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in August
Vermillion, SD
- Average rainfall in August: 2.24"
The wettest month (with the highest rainfall) is June (3.35").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in August
Vermillion, SD
- Average rainfall days in August: 13.7 days
The month with the highest number of rainy days is June (17.3 days).
The months with the least rainy days are January and February (2.8 days).
Average snowfall in August
Vermillion, SD
- Average snowfall in August: 0"
The months with the highest snowfall are January and February (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Vermillion, SD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Vermillion, SD
- Average daylight in August: 13h and 54min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 10h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Vermillion, SD
- Average sunshine days in August: 15.1 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in August
Vermillion, SD
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Vermillion, SD
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in August
Vermillion, SD
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
