SHEMYA USAF BASE, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(508419) SHEMYA USAF BASE
From Year=1949 To Year=1995
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 0 0 0 6 74 207 291 236 87 7 0 910
40 S 0 0 0 0 7 81 288 579 815 903 910 910 910
45 M 0 0 0 0 0 4 61 137 91 10 0 0 303
45 S 0 0 0 0 0 4 65 201 293 303 303 303 303
50 M 0 0 0 0 0 0 4 18 6 0 0 0 27
50 S 0 0 0 0 0 0 4 21 27 27 27 27 27
55 M 0 0 0 0 0 0 0 0 0 0 0 0 0
55 S 0 0 0 0 0 0 0 0 0 0 0 0 0
60 M 0 0 0 0 0 0 0 0 0 0 0 0 0
60 S 0 0 0 0 0 0 0 0 0 0 0 0 0
Corn Growing Degree Days
50 M 0 0 0 0 0 1 12 34 21 1 0 0 69
50 S 0 0 0 0 0 1 13 47 68 69 69 69 69
M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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