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July Weather in Rapid City, United States

Last updated: June 24, 2025

In July, the average temperature in Rapid City, United States is a pleasant 21°C (71°F). Expect lows of 9°C (49°F) and highs reaching up to 36°C (96°F). During this time, precipitation amounts to around 103 mm (4.1 in), spread over approximately 10 days. Additionally, the average humidity is quite high at 75%, contributing to the area's moist conditions.

July Temperature in Rapid City

In July in Rapid City, the average temperature is 21°C (71°F), with maximums reaching up to 36°C (96°F) and minimums dropping to as low as 9°C (49°F). It’s advisable to pack for both warm days and cooler evenings while visiting during this month.

July Weather in Rapid City: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Rapid City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rapid City, July typically has an average temperature of 21°C (71°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec222231415565706861493528
Data source: Temperature data for Rapid City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Rapid City

In Rapid City in July, the precipitation amount is 103 mm (4.1 in) over a span of 10 days.

July Precipitation Trends in Rapid City

The chart displays monthly precipitation patterns in Rapid City, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Rapid City, July typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5762629711911110391781317774
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Rapid City

In Rapid City in July, humidity is 75%. With an average temperature of 21°C (71°F), this humidity feels like a warm blanket wrapping around you, making travel slightly uncomfortable but offering a lush, vibrant atmosphere that invites exploration at a leisurely pace.

July Average Humidity in Rapid City

This chart illustrates the average monthly humidity levels in Rapid City, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Rapid City is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%87%87%82%79%76%76%79%83%86%87%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Rapid City

In Rapid City in July, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Rapid City.

Maximum UV Index Levels in Rapid City for July

The chart shows the monthly maximum UV Index (UVI) for Rapid City in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in Rapid City typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Rapid City July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How July Weather in Rapid City Compares to Other Months

Weather in Rapid City varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Rapid City, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rapid City, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)57 mm (2.2 inches)91%low
February Weather-6°C (22°F)62 mm (2.4 inches)91%moderate
March Weather-1°C (31°F)62 mm (2.4 inches)87%moderate
April Weather5°C (42°F)97 mm (3.8 inches)87%high
May Weather13°C (56°F)119 mm (4.7 inches)82%very high
June Weather19°C (66°F)111 mm (4.4 inches)79%very high
July Weather21°C (71°F)103 mm (4.1 inches)75%very high
August Weather20°C (68°F)91 mm (3.6 inches)76%very high
September Weather16°C (61°F)78 mm (3.1 inches)79%high
October Weather10°C (49°F)131 mm (5.2 inches)83%moderate
November Weather2°C (35°F)77 mm (3.0 inches)86%moderate
December Weather-2°C (28°F)74 mm (2.9 inches)87%low

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