TACOMA WB CITY, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458286) TACOMA WB CITY
From Year=1948 To Year=1981
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 77 120 175 295 491 619 766 769 619 407 192 109 4638
40 S 77 197 371 667 1158 1777 2542 3311 3931 4337 4529 4638 4638
45 M 21 39 63 154 336 469 611 614 469 255 82 33 3147
45 S 21 60 123 278 614 1083 1694 2308 2777 3032 3114 3147 3147
50 M 2 7 12 55 189 319 456 459 320 121 20 4 1965
50 S 2 9 21 76 266 585 1041 1500 1819 1941 1960 1965 1965
55 M 0 1 0 15 79 175 301 304 177 37 2 0 1092
55 S 0 1 1 16 95 270 571 875 1052 1090 1092 1092 1092
60 M 0 0 0 3 25 69 153 153 66 6 0 0 475
60 S 0 0 0 3 28 96 249 403 468 474 475 475 475
Corn Growing Degree Days
50 M 13 33 63 134 251 335 455 457 335 176 51 19 2322
50 S 13 46 109 243 494 829 1283 1740 2075 2251 2302 2322 2322
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