CRATER LAKE NPS HQ, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(351946) CRATER LAKE NATL PARK H
From Year=1919 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 2 5 24 91 215 472 468 307 128 20 3 1736
40 S 1 3 9 33 124 340 811 1279 1586 1714 1733 1736 1736
45 M 0 0 0 5 34 114 323 320 188 57 4 0 1046
45 S 0 0 1 5 40 153 477 797 985 1042 1046 1046 1046
50 M 0 0 0 0 8 47 190 187 93 18 0 0 544
50 S 0 0 0 0 8 55 246 433 526 544 544 544 544
55 M 0 0 0 0 1 14 88 83 32 3 0 0 221
55 S 0 0 0 0 1 15 102 186 218 221 221 221 221
60 M 0 0 0 0 0 3 27 24 6 0 0 0 60
60 S 0 0 0 0 0 3 30 54 60 60 60 60 60
Corn Growing Degree Days
50 M 3 3 7 25 72 150 308 307 210 93 15 4 1197
50 S 3 6 13 39 111 260 568 875 1085 1178 1193 1197 1197
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