COLFAX, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451586) COLFAX 1 NW
From Year=1892 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 12 25 83 230 441 612 829 801 530 275 64 17 3919
40 S 12 37 120 350 791 1403 2232 3033 3563 3838 3902 3919 3919
45 M 2 5 27 118 292 462 674 646 383 151 19 3 2780
45 S 2 7 34 152 443 905 1579 2225 2608 2758 2778 2780 2780
50 M 0 1 6 48 165 314 519 491 244 64 3 0 1857
50 S 0 1 7 55 220 535 1054 1545 1789 1853 1857 1857 1857
55 M 0 0 0 15 76 182 365 339 130 20 0 0 1128
55 S 0 0 1 16 92 274 639 978 1107 1128 1128 1128 1128
60 M 0 0 0 3 28 85 222 198 52 4 0 0 593
60 S 0 0 0 3 31 116 338 536 589 593 593 593 593
Corn Growing Degree Days
50 M 3 11 54 152 279 381 523 514 360 203 34 4 2517
50 S 3 14 69 220 499 880 1403 1916 2276 2479 2513 2517 2517
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