July weather forecast
Napa Junction, SD

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Weather in July

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

Temperature

Napa Junction notes the warmest temperatures in July, with a high average of 84.9°F (29.4°C) and a low of 64.9°F (18.3°C).

Heat index

In July, the heat index is evaluated at a hot 93.2°F (34°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. 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 average relative humidity in July is 71%.

Rainfall

In July, in Napa Junction, the rain falls for 13.4 days. Throughout July, 2.24" (57mm) of precipitation is accumulated. In Napa Junction, South Dakota, during the entire year, the rain falls for 117.9 days and collects up to 21.93" (557mm) of precipitation.

Snowfall

In Napa Junction, snow does not fall in June through September.

Daylight

In Napa Junction, South Dakota, the average length of the day in July is 14h and 59min.
On the first day of July in Napa Junction, sunrise is at 5:55 am and sunset at 9:12 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:51 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10.8h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Napa Junction. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average maximum UV index of 6 in July leads to these recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What month is the hottest in Napa Junction?

July brings the highest temperatures, with an average high of 84.9°F (29.4°C) and an average low of 64.9°F (18.3°C).

How hot is it in Napa Junction in July?

In July, in Napa Junction, 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. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is evaluated at 93.2°F (34°C).

What is the average humidity in July in Napa Junction?

In July, the average relative humidity in Napa Junction, South Dakota, is 71%.

How much does it rain in Napa Junction in July?

In July, in Napa Junction, South Dakota, the rain falls for 13.4 days. Throughout July, 2.24" (57mm) of precipitation is accumulated.

When it does not snow in Napa Junction?

June through September are months without snowfall in Napa Junction, South Dakota.

What is the average length of the day in July in Napa Junction?

In July, the average day length is 14h and 59min.

When are sunrise and sunset in July in Napa Junction?

On the first day of July, sunrise is at 5:55 am and sunset at 9:12 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:51 pm CDT.

What month has the most sunshine in Napa Junction?

With an average of 10.8h of sunshine, July has the most sunshine of the year in Napa Junction.

How long on average sun shines in July in Napa Junction?

In Napa Junction, South Dakota, the average sunshine duration in July is 10.8h.

What are the months with the highest UV index in Napa Junction?

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

What is the UV index reading in July in Napa Junction?

The average daily maximum UV index in July in Napa Junction, South Dakota, is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
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 July
Napa Junction, SD

Average temperature in July - Napa Junction, 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
Napa Junction, SD

Average pressure in July - Napa Junction, 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
Napa Junction, SD

Average wind speed in July - Napa Junction, 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
Napa Junction, SD

Average humidity in July - Napa Junction, 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
Napa Junction, SD

Average rainfall in July - Napa Junction, 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
Napa Junction, SD

Average rainfall days in July - Napa Junction, 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
Napa Junction, SD

Average snowfall in July - Napa Junction, 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
Napa Junction, SD

Average snowfall days in July - Napa Junction, 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
Napa Junction, SD

Average daylight in July / Average sunshine in July - Napa Junction, SD
  • Average daylight in July: 15h and 0min

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 July: 10h and 5min

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
Napa Junction, SD

Average sunshine days in July - Napa Junction, 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
Napa Junction, SD

Average UV index in July - Napa Junction, 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
Napa Junction, SD

Average cloud cover in July - Napa Junction, 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
Napa Junction, SD

Average visibility in July - Napa Junction, 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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Napa Junction, South Dakota, USA

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