TODAY JUN24
TEMPERATURE70
HUMIDITY81
PRESSURE29.72
WIND COND.140 6.9
  • 7963Sun30%50%
  • 7261Mon70%70%
  • 7861Tue40%20%
  • 8361Wed20%
  • 8566Thu30%
daynightWeather update from Watertown, Watertown Municipal Airport at

Castlewood Average Weather

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
January-33°F43°F14°F0.3"
February-28°F59°F16°F0.3"
March-19°F70°F30°F1.1"
April9°F86°F44°F1.6"
May20°F93°F56°F2.7"
June39°F93°F66°F2.9"
July44°F103°F72°F1.9"
August39°F97°F69°F3.6"
September30°F90°F61°F2.9"
October16°F86°F45°F2.5"
November0°F74°F33°F0.3"
December-20°F55°F16°F0.4"

Did you know?

  • The highest monthly average temperature in Castlewood for July is 72 degrees.
  • The lowest monthly average temperature in Castlewood for January is 14 degrees.
  • The most monthly precipitation in Castlewood occurs in August with 3.6 inches.
  • The air quality index in Castlewood is 27% better than the national average.
  • The pollution index in Castlewood is 96% better than the national average.

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Compare Castlewood, SD Weather To Other Cities

Castlewood 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.
IndexCastlewoodSouth DakotaNational
Air quality index363650
Pollution index199,107463,9835,066,862

Castlewood air quality information

MeasurementTotal
Days measured361
Days with good air quality278
Days with moderate air quality83
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Castlewood air quality information

PollutantTotal
Arsenic0.000%
Benzene0.003%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Castlewood temperature with heat index

Castlewood monthly precipitation with daily maximum

Castlewood monthly snow depth with daily maximum

Castlewood monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Estelline, SD8823530%
Goodwin, SD1253628%
Lake Poinsett, SD4353628%
Hayti, SD4153628%
Watertown, SD22,0263628%
Castlewood, SD6093628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Coalville, IA6093726%
Madison, CA6095510%
Evansville, MN6092942%
Whitesburg, GA609524%
New Washington, IN6095510%
Castlewood, SD6093628%
Source: The Castlewood, 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.