KEYSTONE, SOUTH DAKOTA

Period of Record General Climate Summary - Cooling Degree Days

Station:(394556) KEYSTONE
From Year=1990 To Year=1997
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 0 0 6 51 177 275 315 124 19 0 0 967
57 0 0 0 3 34 132 217 257 92 11 0 0 745
60 0 0 0 1 17 75 141 175 54 3 0 0 466
65 0 0 0 0 4 21 54 68 17 0 0 0 163
70 0 0 0 0 1 3 14 15 3 0 0 0 36
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu