Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Rapid City experiences a minor change to a still warm 82.8°F (28.2°C) in average high-temperature during August, closely reflecting July. Rapid City observes an average nighttime temperature of 61.5°F (16.4°C) during August.Heat index
The heat index for August is appraised at 84.2°F (29°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. 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. 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 essentially critical for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 50%.Rainfall
In Rapid City, South Dakota, in August, during 12.8 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Rapid City, during the entire year, the rain falls for 118.8 days and collects up to 15.39" (391mm) of precipitation.Snowfall
June through August are months without snowfall in Rapid City.Daylight
The average length of the day in August is 13h and 57min.On the first day of August in Rapid City, South Dakota, sunrise is at 5:41 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:30 pm MDT.
Sunshine
With an average of 11.8h of sunshine, August has the most sunshine of the year.UV index
In Rapid City, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In August, a daily UV index of 5 turns into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
How hot is August in Rapid City?
What are the least humid months in Rapid City?
What is the average humidity in August in Rapid City?
How much does it rain in Rapid City in August?
When it does not snow in Rapid City?
Does it snow in Rapid City in August?
What is the average length of the day in August in Rapid City?
When is the sunrise / sunset in August in Rapid City?
What month has the most sunshine in Rapid City?
How many hours of sunshine does Rapid City have in August?
How high is the UV index in August in Rapid City?
Average temperature in August
Rapid City, SD
- Average high temperature in August: 82.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in August: 61.5°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).
Average pressure in August
Rapid City, SD
- Average pressure in August: 29.9"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in August
Rapid City, SD
- Average wind speed in August: 8.2mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in August
Rapid City, SD
- Average humidity in August: 50%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).
Average rainfall in August
Rapid City, SD
- Average rainfall in August: 1.5"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in August
Rapid City, SD
- Average rainfall days in August: 12.8 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).
Average snowfall in August
Rapid City, SD
- Average snowfall in August: 0"
The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Rapid City, SD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Rapid City, SD
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 11h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in August
Rapid City, SD
- Average sunshine days in August: 14.5 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).
Average UV index in August
Rapid City, SD
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Rapid City, SD
- Average cloud cover in August: 16
The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in August
Rapid City, 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).
Rapid City, South Dakota, USA
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