July weather forecast and climate
Sioux Falls, SD

The Sioux Falls in South Dakota, flowing downstream over rocks under the perfect evening skyline
The Sioux Falls in South Dakota, flowing downstream over rocks under the perfect evening skyline

Weather in July

July, like June, in Sioux Falls, South Dakota, is a moderately hot summer month, with average temperature ranging between max 82.4°F (28°C) and min 63.1°F (17.3°C).

Temperature

July is the warmest month, with an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C).

Heat index

In July, the average heat index is evaluated at a tropical 88.5°F (31.4°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, clothing, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In July, the average relative humidity in Sioux Falls is 75%.

Rainfall

In Sioux Falls, South Dakota, in July, during 13.2 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. Throughout the year, in Sioux Falls, there are 117.1 rainfall days, and 20.71" (526mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Sioux Falls.

Daylight

The average length of the day in July is 15h.

Sunshine

July has the most sunshine of the year, with an average of 10.7h of sunshine.

UV index

June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Sioux Falls?

July is the warmest month, with an average high-temperature of 82.4°F (28°C) and an average low-temperature of 63.1°F (17.3°C).

What is the temperature in July in Sioux Falls?

In Sioux Falls, South Dakota, in July, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 63.1°F (17.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that factores the actual air temperature with the relative humidity, in July is calculated to 88.5°F (31.4°C).

What is the average humidity in July in Sioux Falls?

In Sioux Falls, South Dakota, the average relative humidity in July is 75%.

How many days does it rain in July in Sioux Falls?

In Sioux Falls, in July, during 13.2 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow in Sioux Falls?

June through September are months without snowfall.

How many hours of daylight does Sioux Falls have in July?

The average length of the day in July is 15h.

What month has the most sunshine in Sioux Falls?

The month with the most sunshine is July, with an average of 10.7h of sunshine.

How long on average sun shines in July in Sioux Falls?

In July, the average sunshine is 10.7h.

What is the month with the highest UV index in Sioux Falls?

Months with the highest UV index in Sioux Falls, South Dakota, are June and July, with an average maximum UV index of 6.

What is the UV index intensity in July in Sioux Falls?

In July, the average daily maximum UV index in Sioux Falls is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in July
Sioux Falls, SD

Average temperature in July - Sioux Falls, SD
  • Average high temperature in July: 82.4°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in July: 63.1°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 (9.7°F).

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Average pressure in July
Sioux Falls, SD

Average pressure in July - Sioux Falls, SD
  • Average pressure in July: 29.93"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in July
Sioux Falls, SD

Average wind speed in July - Sioux Falls, SD
  • Average wind speed in July: 8mph

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (8mph).

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Average humidity in July
Sioux Falls, SD

Average humidity in July - Sioux Falls, SD
  • Average humidity in July: 75%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (66%).

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Average rainfall in July
Sioux Falls, SD

Average rainfall in July - Sioux Falls, SD
  • Average rainfall in July: 2.28"

The wettest month (with the highest rainfall) is June (3.27").
The driest months (with the least rainfall) are January, February and November (0.67").

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Average rainfall days in July
Sioux Falls, SD

Average rainfall days in July - Sioux Falls, SD
  • Average rainfall days in July: 13.2 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 days).

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Average snowfall in July
Sioux Falls, SD

Average snowfall in July - Sioux Falls, SD
  • Average snowfall in July: 0"

The month with the highest snowfall is February (4.25").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Sioux Falls, SD

Average snowfall days in July - Sioux Falls, SD
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (11.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Sioux Falls, SD

Average daylight in July / Average sunshine in July - Sioux Falls, SD
  • Average daylight in July: 15h

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in July: 10.7h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is January (Average sunshine: 4h).

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Average sunshine days in July
Sioux Falls, SD

Average sunshine days in July - Sioux Falls, SD
  • Average sunshine days in July: 14.5 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is June (10 days).

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Average UV index in July
Sioux Falls, SD

Average UV index in July - Sioux Falls, SD
  • Average UV index in July: 6

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in July
Sioux Falls, SD

Average cloud cover in July - Sioux Falls, SD
  • Average cloud cover in July: 27

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in July
Sioux Falls, SD

Average visibility in July - Sioux Falls, SD
  • Average visibility in July: 6mi

Months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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