N WILLAMETTE EXP STN, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(356151) N WILLAMETTE EXP STN
From Year=1963 To Year=2007
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 83 118 209 305 499 653 834 833 667 408 177 79 4865
40 S 83 201 410 715 1213 1866 2701 3534 4201 4609 4786 4865 4865
45 M 25 38 88 167 344 503 679 678 517 257 74 23 3395
45 S 25 63 151 318 663 1166 1845 2524 3040 3298 3372 3395 3395
50 M 4 7 24 70 201 354 524 523 368 128 19 4 2225
50 S 4 11 35 105 306 660 1184 1707 2075 2203 2221 2225 2225
55 M 0 0 2 22 97 211 369 369 224 44 3 0 1341
55 S 0 1 3 25 122 333 702 1071 1295 1339 1341 1341 1341
60 M 0 0 0 5 39 101 220 219 108 10 0 0 702
60 S 0 0 0 5 44 145 365 584 692 702 702 702 702
Corn Growing Degree Days
50 M 20 48 101 157 272 373 509 512 398 223 63 18 2695
50 S 20 68 169 326 598 972 1481 1993 2391 2613 2677 2695 2695
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