WATERVILLE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459012) WATERVILLE
From Year=1931 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 1 2 40 194 431 612 853 832 561 228 15 1 3769
40 S 1 3 43 236 667 1279 2132 2964 3525 3753 3768 3769 3769
45 M 0 0 10 93 284 462 698 677 413 119 2 0 2757
45 S 0 0 10 103 387 849 1547 2224 2637 2756 2757 2757 2757
50 M 0 0 2 37 161 315 543 522 273 51 0 0 1903
50 S 0 0 2 38 199 514 1057 1579 1852 1903 1903 1903 1903
55 M 0 0 0 11 77 185 389 369 155 17 0 0 1203
55 S 0 0 0 11 88 272 662 1031 1186 1203 1203 1203 1203
60 M 0 0 0 3 30 91 245 228 74 4 0 0 676
60 S 0 0 0 3 33 124 369 598 672 676 676 676 676
Corn Growing Degree Days
50 M 0 1 26 123 259 367 535 521 348 143 8 0 2331
50 S 0 2 27 150 409 776 1311 1832 2179 2322 2330 2331 2331
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