SHELTON, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457584) SHELTON
From Year=1931 To Year=1999
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 65 86 156 285 487 612 764 764 598 364 148 75 4405
40 S 65 151 308 593 1080 1692 2456 3219 3818 4182 4330 4405 4405
45 M 16 23 53 147 332 462 609 609 448 216 55 19 2988
45 S 16 39 92 238 571 1033 1642 2250 2699 2914 2969 2988 2988
50 M 1 3 9 53 187 313 454 454 299 95 10 2 1880
50 S 1 4 13 67 254 567 1020 1474 1773 1868 1878 1880 1880
55 M 0 0 1 13 80 170 299 299 159 26 1 0 1047
55 S 0 0 1 14 93 263 562 861 1020 1046 1047 1047 1047
60 M 0 0 0 2 26 66 154 151 56 3 0 0 458
60 S 0 0 0 2 28 94 248 399 455 458 458 458 458
Corn Growing Degree Days
50 M 10 27 72 154 273 346 457 459 349 180 42 11 2382
50 S 10 37 110 264 537 883 1340 1799 2148 2328 2370 2382 2382
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