DULUTH HARBOR STN, MINNESOTA

Period of Record General Climate Summary - Cooling Degree Days

Station:(212246) DULUTH HARBOR STN
From Year=1933 To Year=2004
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 2 27 124 341 321 121 13 0 0 948
57 0 0 0 1 17 90 284 262 87 7 0 0 748
60 0 0 0 0 9 52 203 182 48 2 0 0 497
65 0 0 0 0 3 16 93 79 13 0 0 0 204
70 0 0 0 0 1 3 28 22 2 0 0 0 56
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