STEVENS PASS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458089) STEVENS PASS
From Year=1939 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 8 32 123 270 500 495 315 114 3 0 1861
40 S 0 1 9 41 164 434 934 1428 1743 1857 1861 1861 1861
45 M 0 0 1 8 56 155 349 343 190 47 0 0 1150
45 S 0 0 1 10 66 221 570 913 1103 1150 1150 1150 1150
50 M 0 0 0 1 20 76 215 206 96 15 0 0 630
50 S 0 0 0 1 22 98 313 519 615 630 630 630 630
55 M 0 0 0 0 6 30 112 105 37 3 0 0 292
55 S 0 0 0 0 6 36 148 252 289 292 292 292 292
60 M 0 0 0 0 1 9 46 44 8 0 0 0 108
60 S 0 0 0 0 1 10 56 99 108 108 108 108 108
Corn Growing Degree Days
50 M 0 0 5 18 66 137 275 260 159 47 1 0 970
50 S 0 0 5 24 90 227 502 763 922 969 970 970 970
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