SEQUIM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457538) SEQUIM
From Year=1931 To Year=1980
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 46 68 119 233 409 527 647 658 537 331 129 65 3767
40 S 46 114 233 466 874 1401 2048 2706 3243 3574 3703 3767 3767
45 M 8 13 31 100 254 377 492 503 387 183 39 12 2399
45 S 8 21 52 152 406 783 1275 1778 2164 2348 2387 2399 2399
50 M 1 1 4 24 116 227 337 348 238 69 5 1 1371
50 S 1 2 5 30 146 373 710 1058 1296 1365 1370 1371 1371
55 M 0 0 0 3 34 94 185 194 106 13 0 0 630
55 S 0 0 0 4 37 131 316 510 616 629 630 630 630
60 M 0 0 0 0 7 24 66 65 27 1 0 0 190
60 S 0 0 0 0 7 31 96 162 189 190 190 190 190
Corn Growing Degree Days
50 M 9 19 45 106 206 272 359 369 284 150 39 13 1870
50 S 9 28 73 178 384 656 1015 1384 1667 1817 1857 1870 1870
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