August weather forecastDallas, SD
August
Weather in August
The last month of the summer, August, is another warm month in Dallas, South Dakota, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 85.8°F (29.9°C).Temperature
During August, the average high-temperature is a moderately hot 85.8°F (29.9°C), maintaining a close resemblance to that of the preceding month. Dallas records a pronounced decline from the day's peak to an average nighttime low-temperature of 63.9°F (17.7°C) throughout August.Heat index
August's mean heat index is calculated to be a tropical 89.6°F (32°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
August and September, with an average relative humidity of 57%, are the least humid months.Rainfall
In Dallas, during August, the rain falls for 11.8 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 103.9 rainfall days, and 16.85" (428mm) of precipitation is accumulated.Snowfall
In Dallas, snow does not fall in June through September.Daylight
In Dallas, the average length of the day in August is 13h and 54min.On the first day of August, sunrise is at 6:29 am and sunset at 8:59 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 8:14 pm CDT.
Sunshine
The average sunshine in August is 11h.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 threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In August, a daily maximum UV index of 6 leads to the following instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Dallas, SD
- Average high temperature in August: 85.8°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in August: 63.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in August
Dallas, SD
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in August
Dallas, SD
- Average wind speed in August: 9.8mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (9.8mph).
Average humidity in August
Dallas, SD
- Average humidity in August: 57%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are August and September (57%).
Average rainfall in August
Dallas, SD
- Average rainfall in August: 1.46"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in August
Dallas, SD
- Average rainfall days in August: 11.8 days
The month with the highest number of rainy days is June (15.3 days).
The months with the least rainy days are January and February (2.7 days).
Average snowfall in August
Dallas, SD
- Average snowfall in August: 0"
The month with the highest snowfall is December (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Dallas, SD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Dallas, 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 0min).
- Average sunshine in August: 11h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in August
Dallas, SD
- Average sunshine days in August: 15.4 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in August
Dallas, 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
Dallas, SD
- Average cloud cover in August: 20
The month with the most cloud cover is January (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in August
Dallas, 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).
