COLVILLE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451630) COLVILLE
From Year=1917 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 5 73 274 505 666 885 833 566 246 23 4 4080
40 S 1 6 79 353 858 1524 2409 3241 3807 4053 4076 4080 4080
45 M 0 0 18 147 352 516 730 678 417 127 5 0 2990
45 S 0 1 19 166 517 1034 1763 2441 2858 2985 2989 2990 2990
50 M 0 0 2 61 211 366 575 523 275 47 0 0 2060
50 S 0 0 2 63 274 640 1215 1738 2012 2060 2060 2060 2060
55 M 0 0 0 19 102 223 420 368 150 11 0 0 1294
55 S 0 0 0 19 121 344 765 1133 1283 1294 1294 1294 1294
60 M 0 0 0 4 37 105 268 221 61 1 0 0 696
60 S 0 0 0 4 40 145 413 634 695 696 696 696 696
Corn Growing Degree Days
50 M 0 3 65 214 344 426 550 528 385 174 8 1 2697
50 S 0 3 68 282 625 1051 1601 2129 2515 2689 2697 2697 2697
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