TODAY NOV23
TEMPERATURE21
HUMIDITY93
PRESSURE
WIND COND.
  • 4824Sat
  • 3114Sun30%20%
  • 3518Mon
  • 4023Tue
  • 3717Wed
daynightWeather update from Spearfish / Clyde Ice at
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Weather Quick Facts

  • The highest monthly average temperature in Spearfish for July is 74.8 degrees
  • The lowest monthly average temperature in Spearfish for December is 24.3 degrees
  • The most monthly precipitation in Spearfish occurs in August with 6.4 inches
  • The air quality index in Spearfish is 5% worse than the national average
  • The pollution index in Spearfish is 82% better than the national average

Compare Spearfish, SD Weather

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      Spearfish Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January15°F38°F26°F0.8"
      February16°F40°F27°F1.2"
      March26°F53°F38°F2.5"
      April33°F59°F45°F4.6"
      May43°F68°F55°F6.2"
      June54°F81°F67°F5.1"
      July61°F89°F75°F3.4"
      August59°F87°F72°F6.4"
      September50°F79°F63°F4.3"
      October37°F63°F49°F5.6"
      November25°F51°F37°F3.2"
      December14°F36°F24°F1.6"

      Spearfish air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSpearfishSouth DakotaNational
      Air quality index443642
      Pollution index486,607345,6232,726,193

      Spearfish air quality

      MeasurementTotal
      Days measured365
      Days with good air quality274
      Days with moderate air quality87
      Days w/ poor A.Q. for sensitive groups4
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.003%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.080%
      Mercury0.001%

      Average monthly Spearfish temperature with heat index

      Spearfish monthly precipitation with daily maximum

      Spearfish monthly snow depth with daily maximum

      Spearfish monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Central City, SD1574412.0%
      St. Onge, SD254412.0%
      Fruitdale, SD974412.0%
      Deadwood, SD1,5844412.0%
      Sturgis, SD6,9144412.0%
      Spearfish, SD11,7024412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Crossville, TN11,704536.0%
      Little Chute, WI11,7043726.0%
      El Campo, TX11,6953138.0%
      Smyrna, DE11,6944216.0%
      Salem, OH11,6924216.0%
      Spearfish, SD11,7024412.0%
      Source: The Spearfish, SD weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.