UNIONVILLE, MARYLAND

Period of Record General Climate Summary - Cooling Degree Days

From Year=1940 To Year=1996
Station:(189030) UNIONVILLE
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 11 62 219 444 589 527 315 88 14 1 2271
57 0 0 7 44 173 385 527 466 262 63 9 1 1937
60 0 0 4 25 115 298 434 374 191 34 4 0 1478
65 0 0 1 7 45 170 282 228 96 11 1 0 840
70 0 0 0 1 10 73 144 105 36 3 0 0 372
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