SEWARD, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(508371) SEWARD
From Year=1949 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 1229 1059 1048 807 606 393 278 290 465 789 1012 1191 9167
60 1074 918 893 657 451 247 135 145 315 634 862 1036 7367
57 981 833 800 567 359 164 62 70 227 541 772 943 6320
55 919 777 738 507 299 113 28 34 170 479 712 881 5657
50 764 635 583 358 156 26 1 1 55 325 562 726 4192
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 Jul 28, 2006
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