August weather forecastSummerville, SD
August
Weather in August
The last month of the summer, August, is another warm month in Summerville, South Dakota, with an average temperature fluctuating between 61.9°F (16.6°C) and 82.6°F (28.1°C).Temperature
Summerville experiences a recorded average high-temperature of a still moderately hot 82.6°F (28.1°C) in August, closely aligned with July's 84.7°F (29.3°C). In the month of August, an average of 61.9°F (16.6°C) marks the low-temperature.Heat index
The heat index in August is appraised at 84.2°F (29°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
August and September, with an average relative humidity of 51%, are the least humid months.Rainfall
In August, the rain falls for 11.3 days. Throughout August, 1.34" (34mm) of precipitation is accumulated. In Summerville, South Dakota, during the entire year, the rain falls for 101.3 days and collects up to 14.25" (362mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in August is 14h and 4min.On the first day of the month, sunrise is at 5:32 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:09 am and sunset at 7:28 pm MDT.
Sunshine
The month with the most sunshine is August, with an average of 11.5h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Summerville. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. 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. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Summerville, SD
- Average high temperature in August: 82.6°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in August
Summerville, SD
- Average pressure in August: 29.9"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in August
Summerville, SD
- Average wind speed in August: 9.6mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).
Average humidity in August
Summerville, SD
- Average humidity in August: 51%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in August
Summerville, SD
- Average rainfall in August: 1.34"
The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in August
Summerville, SD
- Average rainfall days in August: 11.3 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in August
Summerville, SD
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Summerville, SD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Summerville, SD
- Average daylight in August: 14h and 6min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in August: 11h and 30min
The month with the most sunshine is August (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in August
Summerville, SD
- Average sunshine days in August: 16.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in August
Summerville, 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 December (UV index 1).
Average cloud cover in August
Summerville, SD
- Average cloud cover in August: 20
The months with the most cloud cover are January and February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in August
Summerville, 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).
