SEWARD 8 NW, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(508375) SEWARD 9 NW
From Year=1983 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 1432 1220 1163 877 648 414 311 379 568 940 1261 1426 10638
60 1277 1079 1008 727 493 266 161 227 418 785 1111 1271 8821
57 1184 994 915 637 400 180 84 142 328 692 1021 1178 7754
55 1122 938 853 577 339 127 44 91 268 630 961 1116 7066
50 967 797 698 427 193 31 3 14 130 475 811 961 5507
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