FREDERICK WFMD, MARYLAND

Period of Record General Climate Summary - Cooling Degree Days

From Year=1948 To Year=2012
Station:(183350) FREDERICK WFMD
Averages Daily Extremes
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 1 1 14 75 234 474 634 578 351 110 15 1 2489
57 0 1 9 55 186 415 572 516 298 80 9 1 2141
60 0 0 4 33 123 328 479 423 222 48 4 0 1664
65 0 0 1 11 51 197 325 272 120 17 1 0 994
70 0 0 0 2 15 97 181 138 51 4 0 0 488
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 May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster