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Rapid City (zip 57702), South Dakota, gets 18 inches of rain per year. The US average is 39. Snowfall is 38 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 40.

On average, there are 226 sunny days per year in Rapid City (zip 57702), South Dakota. The July high is around 85 degrees. The January low is 14. Sperling's comfort index for Rapid City (zip 57702) is a 66 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

  CLIMATERapid City, South DakotaUnited States
  Rainfall (in.)  18.431339.2
  Snowfall (in.)  38.248125.8
  Precipitation Days  40102
  Sunny Days  226205
  Avg. July High  84.72486.1
  Avg. Jan. Low  14.1122.6
  Comfort Index (higher=better)  6654
  UV Index  4.64.3
  Elevation ft.  3,4691,443

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