TOK, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(509313) TOK
From Year=1954 To Year=2012
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 15 182 453 568 420 119 3 0 0 1761
40 S 0 0 0 16 198 651 1219 1639 1758 1761 1761 1761 1761
45 M 0 0 0 4 81 306 414 270 45 1 0 0 1121
45 S 0 0 0 4 85 391 805 1075 1120 1121 1121 1121 1121
50 M 0 0 0 1 27 171 263 140 12 0 0 0 615
50 S 0 0 0 1 28 199 462 603 615 615 615 615 615
55 M 0 0 0 0 7 70 128 54 2 0 0 0 262
55 S 0 0 0 0 7 77 205 260 262 262 262 262 262
60 M 0 0 0 0 1 18 40 15 0 0 0 0 75
60 S 0 0 0 0 2 20 60 75 75 75 75 75 75
Corn Growing Degree Days
50 M 0 0 0 22 169 308 365 283 97 3 0 0 1246
50 S 0 0 0 22 191 499 864 1147 1244 1246 1246 1246 1246
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