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
August reports an average high-temperature of a still moderately hot 82°F (27.8°C), slightly varied from July's 84°F (28.9°C). In Jefferson, an average low-temperature of 61.3°F (16.3°C) is recorded during August nights.Heat index
August's average heat index is estimated at a tropical 87.8°F (31°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.The standards for the heat index are set for locations in shade and under light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
In Jefferson, the average relative humidity in August is 74%.Rainfall
In Jefferson, during August, the rain falls for 13.6 days and regularly aggregates up to 2.2" (56mm) of precipitation. In Jefferson, during the entire year, the rain falls for 122 days and collects up to 21.61" (549mm) of precipitation.Snowfall
June through September are months without snowfall in Jefferson, South Dakota.Daylight
In August, the average length of the day in Jefferson is 13h and 52min.On the first day of August, sunrise is at 6:19 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 8:01 pm CDT.
Sunshine
In Jefferson, the average sunshine in August is 9.9h.UV index
In August, the average daily maximum UV index in Jefferson is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during August translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What is the average August temperature in Jefferson?
What is the average humidity in August in Jefferson?
How much does it rain in Jefferson in August?
When it does not snow in Jefferson?
How many hours of daylight does Jefferson have in August?
What time are sunrise and sunset in August in Jefferson?
How many hours of sunshine does Jefferson have in August?
What is the UV index reading in August in Jefferson?
Average temperature in August
Jefferson, SD
- Average high temperature in August: 82°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°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 (13.1°F).
Average pressure in August
Jefferson, 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 (29.86"Hg).
Average wind speed in August
Jefferson, SD
- Average wind speed in August: 8mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in August
Jefferson, SD
- Average humidity in August: 74%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).
Average rainfall in August
Jefferson, SD
- Average rainfall in August: 2.2"
The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in August
Jefferson, SD
- Average rainfall days in August: 13.6 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in August
Jefferson, SD
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Jefferson, 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
Jefferson, SD
- Average daylight in August: 13h and 5min
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: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in August
Jefferson, SD
- Average sunshine days in August: 14.7 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in August
Jefferson, SD
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Jefferson, SD
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in August
Jefferson, 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).
Jefferson, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location
