PACKWOOD, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456262) PACKWOOD
From Year=1924 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 24 46 114 236 434 585 774 769 581 320 82 20 3985
40 S 24 70 184 421 854 1439 2213 2982 3563 3883 3965 3985 3985
45 M 4 9 37 116 284 435 619 614 431 179 23 2 2753
45 S 4 13 50 166 450 885 1504 2118 2549 2728 2751 2753 2753
50 M 0 1 7 44 155 288 464 459 285 75 3 0 1781
50 S 0 1 8 52 207 495 959 1418 1702 1778 1781 1781 1781
55 M 0 0 1 12 68 157 312 306 155 21 0 0 1031
55 S 0 0 1 12 80 237 549 854 1009 1030 1031 1031 1031
60 M 0 0 0 2 23 67 173 166 64 4 0 0 498
60 S 0 0 0 2 25 92 265 430 494 498 498 498 498
Corn Growing Degree Days
50 M 10 32 76 145 252 331 472 475 362 189 35 5 2385
50 S 10 42 118 263 515 846 1318 1793 2155 2344 2379 2385 2385
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