ROSS DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457185) ROSS DAM
From Year=1960 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 6 12 65 198 419 590 779 809 582 299 58 8 3823
40 S 6 18 83 280 699 1289 2068 2877 3459 3758 3816 3823 3823
45 M 0 0 13 89 270 440 624 654 432 162 12 1 2698
45 S 0 1 14 103 373 813 1436 2090 2523 2685 2697 2698 2698
50 M 0 0 1 31 147 292 469 499 286 66 1 0 1792
50 S 0 0 1 32 179 471 940 1439 1725 1791 1792 1792 1792
55 M 0 0 0 7 65 165 318 346 159 20 0 0 1080
55 S 0 0 0 7 72 238 555 901 1060 1080 1080 1080 1080
60 M 0 0 0 1 22 80 185 207 70 3 0 0 567
60 S 0 0 0 1 23 103 288 494 565 567 567 567 567
Corn Growing Degree Days
50 M 1 2 29 99 214 315 460 487 314 120 8 1 2050
50 S 1 3 32 131 345 660 1121 1608 1921 2041 2049 2050 2050
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