TILLAMOOK, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358494) TILLAMOOK 1 W
From Year=1948 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 134 150 184 240 373 476 573 592 522 385 222 141 3990
40 S 134 283 467 707 1080 1556 2129 2720 3242 3627 3849 3990 3990
45 M 49 57 70 107 220 326 418 437 372 233 103 50 2442
45 S 49 106 176 283 503 829 1247 1683 2055 2289 2392 2442 2442
50 M 9 12 16 28 90 179 263 282 224 106 29 9 1248
50 S 9 21 37 66 156 335 598 879 1104 1210 1239 1248 1248
55 M 0 1 3 5 23 60 118 134 97 30 3 0 474
55 S 0 2 4 9 32 92 210 344 441 471 474 474 474
60 M 0 0 0 1 4 9 25 31 24 5 0 0 100
60 S 0 0 0 1 6 15 40 71 94 100 100 100 100
Corn Growing Degree Days
50 M 36 55 75 107 175 234 301 321 292 200 85 36 1917
50 S 36 91 166 273 448 681 983 1303 1596 1796 1881 1917 1917
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