SAN DIEGO LINDBERGH FLD, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047740) SAN DIEGO WSO AIRPORT
From Year=1914 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 509 493 585 633 723 776 918 961 895 810 643 534 8480
40 S 509 1002 1588 2220 2943 3719 4637 5598 6493 7303 7946 8480 8480
45 M 355 352 430 483 568 626 763 806 745 655 493 379 6654
45 S 355 706 1137 1619 2187 2813 3576 4382 5127 5782 6275 6654 6654
50 M 203 211 275 333 413 476 608 651 595 500 343 226 4834
50 S 203 414 690 1023 1436 1911 2519 3170 3766 4265 4608 4834 4834
55 M 77 86 127 184 258 326 453 496 445 345 196 90 3084
55 S 77 164 291 475 733 1059 1512 2008 2453 2798 2994 3084 3084
60 M 16 19 31 60 109 176 298 341 295 192 73 18 1628
60 S 16 35 66 126 235 410 708 1050 1345 1537 1610 1628 1628
Corn Growing Degree Days
50 M 247 238 289 335 413 475 607 651 591 497 354 264 4961
50 S 247 485 774 1109 1522 1997 2604 3254 3845 4343 4697 4961 4961
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