GROTTO, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(453386) GROTTO
From Year=1955 To Year=1969
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 16 58 102 237 449 582 726 712 558 340 97 26 3903
40 S 16 73 176 412 862 1444 2170 2882 3440 3780 3877 3903 3903
45 M 1 14 36 107 297 432 571 557 408 197 30 3 2654
45 S 1 16 52 159 457 889 1460 2016 2425 2622 2652 2654 2654
50 M 0 3 9 35 165 283 416 402 261 92 6 0 1673
50 S 0 3 12 47 212 496 912 1314 1575 1667 1673 1673 1673
55 M 0 0 1 9 75 150 262 248 131 29 0 0 905
55 S 0 0 1 10 85 235 497 745 876 905 905 905 905
60 M 0 0 0 1 26 58 128 115 47 6 0 0 380
60 S 0 0 0 1 27 85 213 328 375 380 380 380 380
Corn Growing Degree Days
50 M 5 26 67 143 265 330 436 421 322 174 36 4 2229
50 S 5 31 98 241 505 836 1272 1693 2015 2189 2225 2229 2229
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