ARIEL DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(450242) ARIEL DAM
From Year=1930 To Year=1971
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 42 -99 -99 357 476 621 721 -99 658 394 114 108 -99
40 S 42 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99
45 M 6 -99 -99 207 322 471 566 -99 510 258 25 51 -99
45 S 6 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99
50 M 0 -99 -99 84 184 322 411 -99 362 144 1 13 -99
50 S 0 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99
55 M 0 -99 -99 22 81 182 256 -99 223 74 0 0 -99
55 S 0 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99
60 M 0 -99 -99 3 25 79 125 -99 110 22 0 0 -99
60 S 0 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99 -99
Corn Growing Degree Days
50 M 8 -99 -99 180 257 357 452 -99 379 172 51 24 -99
50 S 8 -99 -99 -99 -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