TACOMA #1, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458278) TACOMA 1
From Year=1982 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 124 132 235 351 528 657 810 816 642 424 207 96 5021
40 S 124 257 491 842 1370 2027 2837 3653 4295 4719 4925 5021 5021
45 M 41 44 103 204 373 507 655 661 492 272 92 27 3470
45 S 41 84 187 391 764 1270 1926 2586 3079 3350 3443 3470 3470
50 M 6 6 27 86 222 357 500 506 342 135 25 4 2216
50 S 6 12 39 125 347 703 1204 1710 2052 2187 2212 2216 2216
55 M 1 0 4 24 99 209 345 351 196 43 3 0 1275
55 S 1 1 4 29 128 337 682 1033 1229 1272 1274 1275 1275
60 M 0 0 0 4 31 85 192 197 75 6 0 0 590
60 S 0 0 0 4 35 120 312 509 584 590 590 590 590
Corn Growing Degree Days
50 M 24 37 87 158 265 364 498 507 363 189 56 15 2563
50 S 24 60 148 305 571 934 1433 1940 2303 2492 2548 2563 2563
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