SKYKOMISH, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457708) SKYKOMISH
From Year=1935 To Year=1955
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 9 12 77 246 446 581 689 697 569 317 61 12 3716
40 S 9 21 98 344 790 1371 2060 2757 3326 3643 3705 3716 3716
45 M 1 2 21 119 294 431 534 542 419 179 13 0 2555
45 S 1 2 24 143 437 868 1402 1944 2363 2542 2555 2555 2555
50 M 0 0 4 40 162 283 379 387 272 76 1 0 1604
50 S 0 0 4 45 206 489 868 1255 1527 1603 1604 1604 1604
55 M 0 0 1 9 73 153 227 234 145 25 0 0 868
55 S 0 0 1 10 83 236 463 697 842 868 868 868 868
60 M 0 0 0 1 27 63 98 102 61 8 0 0 359
60 S 0 0 0 1 28 91 189 291 352 359 359 359 359
Corn Growing Degree Days
50 M 2 10 52 131 243 324 411 418 330 156 19 1 2098
50 S 2 12 64 195 438 762 1173 1591 1922 2078 2097 2098 2098
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