August weather forecast
Harrisburg, SD

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Weather in August

In August, Harrisburg continues to bask in the summer heat. There's a slight reduction in temperature from July, but the overall environment remains hot yet inviting for activities like picnicking or hiking. With a humidity level of 74%, an ultraviolet index of 5, and nearly 9.9 hours of daily sunshine, it remains a popular month for tourists and residents to explore outdoors.

Temperature

The beginning of August records an average high-temperature of a still moderately hot 81.1°F (27.3°C), marking a negligible difference from July's 82.9°F (28.3°C). The average nighttime temperature lowers to a moderate 60.3°F (15.7°C) throughout August.

Heat index

For August, the heat index is calculated to be a tropical 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including 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 especially crucial for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.

Humidity

In Harrisburg, the average relative humidity in August is 74%.

Rainfall

In Harrisburg, South Dakota, in August, during 13.2 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Harrisburg, during the entire year, the rain falls for 119.2 days and collects up to 21.73" (552mm) of precipitation.

Snowfall

In Harrisburg, snow does not fall in June through September.

Daylight

The average length of the day in August in Harrisburg is 13h and 55min.
On the first day of the month, sunrise is at 6:17 am and sunset at 8:48 pm. On the last day of August, in Harrisburg, sunrise is at 6:50 am and sunset at 8:03 pm CDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

In Harrisburg, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In August, the maximum UV index of 5 translates into these guidelines:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What are the temperatures in Harrisburg in August?

In Harrisburg, 81.1°F (27.3°C) is the average high-temperature and 60.3°F (15.7°C) is the average low-temperature during August. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 86°F (30°C).

What is the average humidity in August in Harrisburg?

In Harrisburg, South Dakota, the average relative humidity in August is 74%.

How much does it rain in Harrisburg in August?

In Harrisburg, during August, the rain falls for 13.2 days and regularly aggregates up to 2.28" (58mm) of precipitation.

When it does not snow in Harrisburg?

In Harrisburg, South Dakota, snow does not fall in June through September.

What is the average length of the day in August in Harrisburg?

In August, the average day length in Harrisburg, South Dakota, is 13h and 55min.

What time are sunrise and sunset in August in Harrisburg?

On the first day of August, sunrise is at 6:17 am and sunset at 8:48 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 8:03 pm CDT.

How many hours of sunshine does Harrisburg have in August?

The average sunshine duration in August is 9.9h.

How high is the UV index in August in Harrisburg?

In August, the average daily maximum UV index in Harrisburg, South Dakota, is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Harrisburg, SD

Average temperature in August - Harrisburg, SD
  • Average high temperature in August: 81.1°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (24.1°F).

  • Average low temperature in August: 60.3°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).

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Average pressure in August
Harrisburg, SD

Average pressure in August - Harrisburg, 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).

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Average wind speed in August
Harrisburg, SD

Average wind speed in August - Harrisburg, SD
  • Average wind speed in August: 8mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).

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Average humidity in August
Harrisburg, SD

Average humidity in August - Harrisburg, SD
  • Average humidity in August: 74%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in August
Harrisburg, SD

Average rainfall in August - Harrisburg, SD
  • Average rainfall in August: 2.28"

The wettest month (with the highest rainfall) is June (3.35").
The driest months (with the least rainfall) are January, February and November (0.67").

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Average rainfall days in August
Harrisburg, SD

Average rainfall days in August - Harrisburg, SD
  • Average rainfall days in August: 13.2 days

The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is January (3.3 days).

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Average snowfall in August
Harrisburg, SD

Average snowfall in August - Harrisburg, SD
  • Average snowfall in August: 0"

The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Harrisburg, SD

Average snowfall days in August - Harrisburg, SD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Harrisburg, SD

Average daylight in August / Average sunshine in August - Harrisburg, SD
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • 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 6min).

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Average sunshine days in August
Harrisburg, SD

Average sunshine days in August - Harrisburg, SD
  • Average sunshine days in August: 15.1 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is June (10.2 days).

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Average UV index in August
Harrisburg, SD

Average UV index in August - Harrisburg, 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).

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Average cloud cover in August
Harrisburg, SD

Average cloud cover in August - Harrisburg, SD
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in August
Harrisburg, SD

Average visibility in August - Harrisburg, 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).

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Harrisburg, South Dakota, USA

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