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Period of Record General Climate Summary - Heating Degree Days

Station:(213296) GRAND PORTAGE RNG STN
From Year=1895 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1697 1441 1268 848 540 269 115 120 322 685 1053 1479 9837
60 1542 1300 1113 698 389 142 36 39 192 531 903 1324 8209
57 1449 1215 1020 609 303 84 14 15 130 440 813 1231 7322
55 1387 1159 958 549 248 55 7 7 96 381 753 1169 6768
50 1232 1017 803 401 131 14 1 0 36 244 604 1014 5497
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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