INDEX 1 SSE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(453909) INDEX
From Year=1894 To Year=1955
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 4 113 173 424 -99 -99 -99 -99 -99 -99 188 19 -99
40 S 4 117 290 714 -99 -99 -99 -99 -99 -99 -99 -99 -99
45 M 0 37 74 285 -99 -99 -99 -99 -99 -99 74 0 -99
45 S 0 37 111 396 -99 -99 -99 -99 -99 -99 -99 -99 -99
50 M 0 4 21 168 -99 -99 -99 -99 -99 -99 17 0 -99
50 S 0 4 25 192 -99 -99 -99 -99 -99 -99 -99 -99 -99
55 M 0 0 2 88 -99 -99 -99 -99 -99 -99 0 0 -99
55 S 0 0 2 90 -99 -99 -99 -99 -99 -99 -99 -99 -99
60 M 0 0 0 30 -99 -99 -99 -99 -99 -99 0 0 -99
60 S 0 0 0 30 -99 -99 -99 -99 -99 -99 -99 -99 -99
Corn Growing Degree Days
50 M 0 15 44 185 -99 -99 -99 -99 -99 -99 27 0 -99
50 S 0 15 58 243 -99 -99 -99 -99 -99 -99 -99 -99 -99
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