BOUNDARY DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(450844) BOUNDARY DAM
From Year=1965 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 0 0 22 162 393 572 802 798 507 170 16 0 3444
40 S 0 0 23 185 579 1150 1953 2750 3257 3427 3444 3444 3444
45 M 0 0 2 68 245 422 647 643 359 70 3 0 2460
45 S 0 0 2 71 316 738 1385 2028 2387 2457 2460 2460 2460
50 M 0 0 0 22 124 276 492 488 221 22 0 0 1645
50 S 0 0 0 22 147 423 915 1403 1623 1645 1645 1645 1645
55 M 0 0 0 5 50 148 339 335 111 4 0 0 992
55 S 0 0 0 5 56 204 543 877 988 992 992 992 992
60 M 0 0 0 1 16 61 199 195 39 0 0 0 512
60 S 0 0 0 1 17 78 277 472 512 512 512 512 512
Corn Growing Degree Days
50 M 0 0 27 124 240 327 485 495 332 107 4 0 2143
50 S 0 0 27 152 392 719 1204 1699 2032 2139 2143 2143 2143
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