EL CAJON YALE RANCH, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(042705) EL CAJON YALE RANCH
From Year=1899 To Year=1959
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 376 392 496 586 718 832 1016 1037 937 775 569 431 8165
40 S 376 768 1264 1849 2567 3400 4416 5453 6390 7165 7734 8165 8165
45 M 226 253 341 436 563 682 861 882 787 620 419 277 6347
45 S 226 478 819 1255 1818 2500 3362 4244 5031 5651 6070 6347 6347
50 M 100 127 190 287 408 532 706 727 637 465 272 137 4588
50 S 100 226 417 703 1111 1644 2350 3077 3714 4179 4451 4588 4588
55 M 25 41 75 148 256 382 551 572 487 311 139 43 3030
55 S 25 66 141 289 545 927 1479 2051 2538 2848 2987 3030 3030
60 M 4 8 17 51 119 234 396 417 337 166 50 7 1806
60 S 4 11 29 80 199 432 829 1246 1583 1749 1799 1806 1806
Corn Growing Degree Days
50 M 267 258 314 353 429 520 654 673 586 485 396 311 5248
50 S 267 526 840 1193 1622 2142 2796 3469 4055 4540 4936 5248 5248
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