TROUTDALE SUBSTATION, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358634) TROUTDALE SUBSTATION
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 78 115 223 345 531 680 858 856 687 447 198 80 5100
40 S 78 193 416 761 1292 1972 2831 3687 4374 4821 5019 5100 5100
45 M 23 36 97 201 376 530 703 701 537 295 87 22 3609
45 S 23 59 156 357 733 1263 1966 2667 3205 3499 3586 3609 3609
50 M 4 7 27 88 228 380 548 546 387 157 23 3 2398
50 S 4 10 38 125 353 733 1282 1828 2216 2372 2395 2398 2398
55 M 0 0 4 28 111 234 393 391 242 60 3 0 1468
55 S 0 1 5 33 144 378 772 1163 1405 1465 1468 1468 1468
60 M 0 0 0 6 44 116 241 239 118 15 0 0 779
60 S 0 0 0 7 50 166 407 646 764 779 779 779 779
Corn Growing Degree Days
50 M 19 38 102 179 292 392 529 528 414 233 66 18 2809
50 S 19 57 159 337 629 1021 1551 2079 2492 2725 2791 2809 2809
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