KENNEWICK, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454154) KENNEWICK
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 48 83 223 420 676 867 1092 1049 752 413 138 51 5812
40 S 48 131 354 774 1450 2317 3409 4458 5209 5623 5761 5812 5812
45 M 15 28 103 273 521 717 937 894 602 266 59 16 4431
45 S 15 43 147 419 941 1657 2594 3488 4090 4356 4415 4431 4431
50 M 3 6 32 142 367 567 782 739 452 141 18 3 3252
50 S 3 10 41 184 551 1118 1899 2638 3090 3232 3249 3252 3252
55 M 0 1 5 56 223 417 627 584 306 57 4 0 2281
55 S 0 1 7 63 286 703 1329 1913 2220 2277 2280 2281 2281
60 M 0 0 0 16 112 271 472 429 174 16 1 0 1490
60 S 0 0 0 16 128 399 871 1300 1474 1490 1490 1490 1490
Corn Growing Degree Days
50 M 17 40 133 256 410 542 688 669 474 246 56 18 3549
50 S 17 57 190 446 856 1398 2087 2755 3229 3475 3531 3549 3549
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