LOS ANGELES INTL AP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045114) LOS ANGELES WSO ARPT
From Year=1944 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 509 484 555 607 706 775 900 931 879 808 640 525 8318
40 S 509 992 1548 2154 2860 3635 4535 5465 6345 7153 7793 8318 8318
45 M 354 342 400 457 551 625 745 776 729 653 490 370 6492
45 S 354 697 1097 1554 2105 2729 3474 4250 4979 5632 6122 6492 6492
50 M 204 203 246 307 396 475 590 621 579 498 340 218 4677
50 S 204 408 653 960 1356 1831 2421 3041 3620 4119 4459 4677 4677
55 M 84 85 105 160 241 325 435 466 429 343 194 90 2959
55 S 84 169 275 435 676 1001 1436 1901 2331 2674 2868 2959 2959
60 M 25 23 25 51 95 175 280 311 279 191 78 23 1555
60 S 25 48 73 124 219 394 673 984 1263 1454 1531 1555 1555
Corn Growing Degree Days
50 M 252 235 266 312 396 473 589 619 573 493 352 263 4823
50 S 252 487 753 1065 1461 1934 2523 3142 3715 4208 4560 4823 4823
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