WHITEHORSE RANCH, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(359290) WHITEHORSE RANCH
From Year=1965 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 18 33 95 193 420 629 901 858 588 304 70 19 4130
40 S 18 51 146 340 760 1389 2290 3149 3737 4041 4110 4130 4130
45 M 4 8 34 100 278 480 746 703 440 181 22 5 3000
45 S 4 11 45 145 423 902 1649 2352 2792 2973 2996 3000 3000
50 M 0 1 8 41 161 335 591 549 301 89 5 1 2081
50 S 0 1 9 50 211 546 1138 1686 1987 2076 2080 2081 2081
55 M 0 0 1 12 78 206 437 396 179 34 1 0 1343
55 S 0 0 1 13 91 297 734 1130 1309 1343 1343 1343 1343
60 M 0 0 0 2 30 106 290 253 85 8 0 0 775
60 S 0 0 0 2 32 138 428 681 766 774 775 775 775
Corn Growing Degree Days
50 M 12 33 88 162 298 414 581 556 410 241 62 14 2872
50 S 12 45 133 296 594 1008 1588 2145 2555 2796 2858 2872 2872
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