INCHELIUM 2 NW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(453903) INCHELIUM 2 NW
From Year=1940 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 5 39 198 466 656 847 816 546 203 19 1 3797
40 S 1 6 44 243 709 1364 2212 3028 3574 3777 3796 3797 3797
45 M 0 0 8 87 315 506 692 661 397 93 2 0 2761
45 S 0 0 8 95 410 915 1608 2269 2666 2759 2761 2761 2761
50 M 0 0 1 27 183 357 537 506 256 30 0 0 1897
50 S 0 0 1 28 211 568 1105 1611 1867 1897 1897 1897 1897
55 M 0 0 0 5 86 217 383 352 137 5 0 0 1185
55 S 0 0 0 5 92 308 691 1044 1181 1185 1185 1185 1185
60 M 0 0 0 1 29 104 236 207 57 0 0 0 634
60 S 0 0 0 1 30 134 370 576 633 634 634 634 634
Corn Growing Degree Days
50 M 0 4 38 155 319 417 532 515 371 141 6 0 2500
50 S 0 4 42 197 516 933 1466 1981 2352 2493 2499 2500 2500
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