BONNEVILLE DAM, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(350897) BONNEVILLE DAM
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 55 85 186 324 520 667 854 858 702 458 184 62 4956
40 S 55 140 326 650 1171 1837 2691 3549 4251 4709 4893 4956 4956
45 M 12 21 71 182 366 517 699 703 552 305 77 15 3520
45 S 12 33 104 286 652 1169 1868 2571 3123 3428 3505 3520 3520
50 M 1 3 17 77 219 367 544 548 402 166 19 2 2364
50 S 1 4 21 98 317 684 1228 1776 2178 2344 2362 2364 2364
55 M 0 0 2 25 107 222 389 393 256 66 2 0 1462
55 S 0 0 2 27 134 356 745 1138 1394 1460 1462 1462 1462
60 M 0 0 0 5 42 106 238 241 131 17 0 0 781
60 S 0 0 0 5 47 153 391 633 763 781 781 781 781
Corn Growing Degree Days
50 M 10 22 74 149 267 374 531 535 410 213 49 11 2646
50 S 10 32 105 254 522 895 1427 1962 2372 2585 2634 2646 2646
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