July weather forecast
Yankton, SD

Weather in July

July, like June, in Yankton, South Dakota, is a moderately hot summer month, with an average temperature fluctuating between 84.9°F (29.4°C) and 64.9°F (18.3°C).

Temperature

July is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 64.9°F (18.3°C).

Heat index

In July, the average heat index is appraised at a hot 93.2°F (34°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, metabolic differences, clothing, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In July, the average relative humidity in Yankton is 71%.

Rainfall

In Yankton, in July, it is raining for 13.4 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Yankton, there are 117.9 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in July is 14h and 58min.
On the first day of July, sunrise is at 5:54 am and sunset at 9:12 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:52 pm CDT.

Sunshine

July has the most sunshine of the year, with an average of 10.8h of sunshine.

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 health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 in July interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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 Yankton?

The warmest month in Yankton, South Dakota, is July, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 64.9°F (18.3°C).

What is the temperature in July in Yankton?

In July, in Yankton, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 64.9°F (18.3°C). in July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is appraised at 93.2°F (34°C).

What is the average humidity in July in Yankton?

In Yankton, the average relative humidity in July is 71%.

How much does it rain in Yankton in July?

In Yankton, in July, it is raining for 13.4 days, with typically 2.24" (57mm) of accumulated precipitation.

When it does not snow in Yankton?

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

What is the average length of the day in July in Yankton?

The average day length in July is 14h and 58min.

When is the sunrise / sunset in July in Yankton?

In July, on the first day of the month, sunrise is at 5:54 am and sunset at 9:12 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:52 pm CDT.

What month has the most sunshine in Yankton?

July has the most sunshine of the year in Yankton, with an average of 10.8h of sunshine.

How long on average sun shines in July in Yankton?

The average sunshine duration in July in Yankton, South Dakota, is 10.8h.

When is the highest UV index in Yankton?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the UV index reading in July in Yankton?

In Yankton, South Dakota, the average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Yankton, SD

Average temperature in July - Yankton, SD
  • Average high temperature in July: 84.9°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (26.8°F).

  • Average low temperature in July: 64.9°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 (12.9°F).

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Average pressure in July
Yankton, SD

Average pressure in July - Yankton, SD
  • Average pressure in July: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in July
Yankton, SD

Average wind speed in July - Yankton, SD
  • Average wind speed in July: 7.9mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).

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Average humidity in July
Yankton, SD

Average humidity in July - Yankton, SD
  • Average humidity in July: 71%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (64%).

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Average rainfall in July
Yankton, SD

Average rainfall in July - Yankton, SD
  • Average rainfall in July: 2.24"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.59").

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Average rainfall days in July
Yankton, SD

Average rainfall days in July - Yankton, SD
  • Average rainfall days in July: 13.4 days

The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in July
Yankton, SD

Average snowfall in July - Yankton, SD
  • Average snowfall in July: 0"

The month with the highest snowfall is December (2.95").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Yankton, SD

Average snowfall days in July - Yankton, SD
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (9.7 days).
The 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
Yankton, SD

Average daylight in July / Average sunshine in July - Yankton, SD
  • Average daylight in July: 14h and 58min

The month with the longest days is June (Average daylight: 15h and 17min).
The month with the shortest days is December (Average daylight: 9h and 5min).

  • Average sunshine in July: 10h and 48min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in July
Yankton, SD

Average sunshine days in July - Yankton, SD
  • Average sunshine days in July: 13 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in July
Yankton, SD

Average UV index in July - Yankton, SD
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in July
Yankton, SD

Average cloud cover in July - Yankton, SD
  • Average cloud cover in July: 25

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in July
Yankton, SD

Average visibility in July - Yankton, SD
  • Average visibility in July: 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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