COLFAX 1 NW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451586) COLFAX 1 NW
From Year=1893 To Year=1994
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 13 30 83 225 446 630 832 813 555 273 64 16 3983
40 S 13 44 127 352 798 1428 2260 3074 3629 3902 3967 3983 3983
45 M 2 7 27 114 297 480 677 658 407 149 20 2 2843
45 S 2 9 36 150 448 928 1605 2263 2670 2820 2840 2843 2843
50 M 0 2 6 47 171 332 522 504 267 64 4 0 1919
50 S 0 2 8 55 225 558 1080 1583 1850 1915 1919 1919 1919
55 M 0 1 0 16 82 198 369 350 149 20 0 0 1185
55 S 0 1 1 17 99 297 666 1016 1165 1185 1185 1185 1185
60 M 0 0 0 4 32 99 226 210 64 4 0 0 638
60 S 0 0 0 4 36 135 360 570 634 638 638 638 638
Corn Growing Degree Days
50 M 3 14 50 142 274 385 519 510 374 203 31 3 2507
50 S 3 16 67 209 483 867 1386 1896 2270 2473 2504 2507 2507
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 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