STEVENS PASS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458089) STEVENS PASS
From Year=1950 To Year=1994
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 1 5 28 122 266 486 487 308 115 3 0 1822
40 S 0 1 6 35 157 423 908 1396 1704 1819 1822 1822 1822
45 M 0 0 1 8 56 153 336 336 185 49 0 0 1123
45 S 0 0 1 8 64 217 553 889 1074 1123 1123 1123 1123
50 M 0 0 0 1 20 75 205 201 93 16 0 0 611
50 S 0 0 0 1 21 96 302 502 595 611 611 611 611
55 M 0 0 0 0 5 28 106 102 35 3 0 0 280
55 S 0 0 0 0 6 34 140 242 277 280 280 280 280
60 M 0 0 0 0 1 8 44 41 8 0 0 0 101
60 S 0 0 0 0 1 9 52 94 101 101 101 101 101
Corn Growing Degree Days
50 M 0 0 2 15 65 132 261 250 151 47 1 0 924
50 S 0 0 2 18 83 215 475 725 876 923 924 924 924
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