SAN DIEGO WSO AIRPORT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047740) SAN DIEGO WSO AIRPORT
From Year=1914 To Year=2005
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 507 493 584 632 722 775 917 960 893 808 642 536 8468
40 S 507 1000 1584 2216 2938 3713 4629 5589 6482 7291 7932 8468 8468
45 M 352 351 429 482 567 625 762 805 743 653 492 381 6642
45 S 352 704 1133 1615 2182 2807 3568 4373 5116 5770 6261 6642 6642
50 M 201 211 275 332 412 475 607 650 593 498 342 228 4823
50 S 201 412 687 1018 1430 1905 2512 3162 3755 4253 4595 4823 4823
55 M 76 86 127 183 257 325 452 495 443 343 194 92 3074
55 S 76 162 289 472 730 1055 1506 2001 2444 2788 2982 3074 3074
60 M 16 19 30 59 108 175 297 340 293 191 72 18 1619
60 S 16 35 65 125 233 408 704 1044 1337 1528 1600 1619 1619
Corn Growing Degree Days
50 M 246 238 289 334 412 474 606 649 589 496 353 266 4953
50 S 246 484 773 1108 1520 1993 2600 3249 3837 4333 4687 4953 4953
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 Apr 5, 2006
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