OLYMPIA WSO AP, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456114) OLYMPIA WSO AP
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 60 75 130 234 424 564 720 722 551 317 128 61 3985
40 S 60 135 265 499 923 1487 2207 2929 3480 3797 3924 3985 3985
45 M 15 20 39 106 270 414 565 567 401 174 45 15 2631
45 S 15 34 73 179 449 863 1428 1995 2396 2571 2616 2631 2631
50 M 2 3 6 34 136 265 410 412 254 68 8 2 1598
50 S 2 4 10 44 180 445 855 1267 1521 1588 1597 1598 1598
55 M 0 0 0 7 51 129 256 258 121 15 0 0 838
55 S 0 0 1 8 59 188 444 702 823 838 838 838 838
60 M 0 0 0 1 14 45 119 117 37 1 0 0 333
60 S 0 0 0 1 15 59 178 295 332 333 333 333 333
Corn Growing Degree Days
50 M 10 29 70 138 246 321 433 437 332 168 38 9 2232
50 S 10 39 109 247 493 815 1248 1684 2016 2184 2223 2232 2232
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