ROSS DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457185) ROSS DAM
From Year=1960 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 6 12 61 193 417 583 782 811 587 296 57 8 3813
40 S 6 17 79 271 688 1272 2054 2866 3453 3749 3806 3813 3813
45 M 0 0 12 86 268 433 627 656 438 159 12 1 2693
45 S 0 1 13 99 367 800 1427 2084 2521 2680 2692 2693 2693
50 M 0 0 1 29 145 286 473 502 291 64 1 0 1790
50 S 0 0 1 30 175 461 933 1435 1726 1790 1790 1790 1790
55 M 0 0 0 6 64 160 321 348 163 19 0 0 1081
55 S 0 0 0 6 70 230 551 899 1063 1081 1081 1081 1081
60 M 0 0 0 1 22 76 188 209 73 3 0 0 570
60 S 0 0 0 1 22 98 286 494 567 570 570 570 570
Corn Growing Degree Days
50 M 1 2 27 96 213 309 464 489 317 117 8 1 2043
50 S 1 3 30 126 338 648 1111 1600 1918 2034 2042 2043 2043
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