July weather forecast
Rapid City, SD

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A scenic panorama of the Rapid City in South Dakota
A scenic panorama of the Rapid City in South Dakota

Weather in July

July is the quintessential summer month in Rapid City. With an average high of 84.7°F (29.3°C), this is the hottest month of the year. Days see more sunshine than any other month, ensuring a true summer experience. Snowfall naturally becomes nonexistent, while daylight hours peak at the zenith of summer. A dip in wind speeds at this time of year serves to amplify the summer weather.

Temperature

July is the warmest month of the year, registering average temperatures as high as 84.7°F (29.3°C) and as low as 63.3°F (17.4°C).

Heat index

July's mean heat index is appraised at a hot 86°F (30°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
In terms of the heat index, values are set with light wind and shade conditions in mind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

In Rapid City, the average relative humidity in July is 52%.

Rainfall

In July, in Rapid City, the rain falls for 13.5 days. Throughout July, 2.05" (52mm) of precipitation is accumulated. Throughout the year, there are 118.8 rainfall days, and 15.39" (391mm) of precipitation is accumulated.

Snowfall

In Rapid City, snow does not fall in June through August.

Daylight

The average length of the day in July in Rapid City is 15h and 6min.
On the first day of the month, sunrise is at 5:14 am and sunset at 8:39 pm. On the last day of July, in Rapid City, South Dakota, sunrise is at 5:40 am and sunset at 8:17 pm MDT.

Sunshine

In July, the average sunshine is 11.7h.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In July, the maximum UV index of 6 transforms into these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the warmest month in Rapid City?

The warmest month in Rapid City, South Dakota, is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 63.3°F (17.4°C).

How hot is July in Rapid City?

In Rapid City, 84.7°F (29.3°C) is the average high-temperature and 63.3°F (17.4°C) is the average low-temperature during July. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in July is appraised at 86°F (30°C).

What is the average humidity in July in Rapid City?

The average relative humidity in July in Rapid City is 52%.

How many days does it rain in July in Rapid City?

In Rapid City, South Dakota, during July, the rain falls for 13.5 days and regularly aggregates up to 2.05" (52mm) of precipitation.

When it does not snow in Rapid City?

In Rapid City, South Dakota, snow does not fall in June through August.

How many hours of daylight does Rapid City have in July?

In July, the average day length in Rapid City, South Dakota, is 15h and 6min.

What time are sunrise and sunset in July in Rapid City?

In July, on the first day of the month, sunrise is at 5:14 am and sunset at 8:39 pm. On the last day of the month, in Rapid City, sunrise is at 5:40 am and sunset at 8:17 pm MDT.

How long on average sun shines in July in Rapid City?

In Rapid City, the average sunshine duration in July is 11.7h.

When is the highest UV index in Rapid City?

The months with the highest UV index in Rapid City, South Dakota, are June and July, with an average maximum UV index of 6.

What is the UV index intensity in July in Rapid City?

In July, the average daily maximum UV index in Rapid City is 6. A UV Index reading of 6 to 7 represents a high health vulnerability 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
Rapid City, SD

Average temperature in July - Rapid City, SD
  • Average high temperature in July: 84.7°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).

  • Average low temperature in July: 63.3°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

Average pressure in July
Rapid City, SD

Average pressure in July - Rapid City, SD
  • Average pressure in July: 29.9"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in July
Rapid City, SD

Average wind speed in July - Rapid City, SD
  • Average wind speed in July: 8.4mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

Average humidity in July
Rapid City, SD

Average humidity in July - Rapid City, SD
  • Average humidity in July: 52%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).

Average rainfall in July
Rapid City, SD

Average rainfall in July - Rapid City, SD
  • Average rainfall in July: 2.05"

The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in July
Rapid City, SD

Average rainfall days in July - Rapid City, SD
  • Average rainfall days in July: 13.5 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).

Average snowfall in July
Rapid City, SD

Average snowfall in July - Rapid City, SD
  • Average snowfall in July: 0"

The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").

Average snowfall days in July
Rapid City, SD

Average snowfall days in July - Rapid City, SD
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in July /
Average sunshine in July
Rapid City, SD

Average daylight in July / Average sunshine in July - Rapid City, SD
  • Average daylight in July: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in July: 11h and 4min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

Average sunshine days in July
Rapid City, SD

Average sunshine days in July - Rapid City, SD
  • Average sunshine days in July: 13.8 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).

Average UV index in July
Rapid City, SD

Average UV index in July - Rapid City, SD
  • Average UV index in July: 6

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).

Average cloud cover in July
Rapid City, SD

Average cloud cover in July - Rapid City, SD
  • Average cloud cover in July: 18

The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in July
Rapid City, SD

Average visibility in July - Rapid City, 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).

Rapid City, South Dakota, USA

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