SAN GABRIEL FIRE DEP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047785) SAN GABRIEL FIRE DEPT
From Year=1939 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 480 478 583 665 795 896 1082 1105 1014 869 625 490 9082
40 S 480 959 1541 2207 3002 3897 4979 6084 7098 7967 8592 9082 9082
45 M 327 337 428 515 640 746 927 950 864 714 475 336 7259
45 S 327 664 1092 1607 2247 2993 3920 4869 5734 6448 6923 7259 7259
50 M 185 202 275 366 485 596 772 795 714 559 326 191 5464
50 S 185 387 662 1027 1512 2108 2880 3674 4389 4948 5273 5464 5464
55 M 77 90 138 222 330 446 617 640 564 405 185 77 3790
55 S 77 167 305 527 857 1303 1920 2559 3124 3528 3714 3790 3790
60 M 21 27 48 103 182 296 462 485 414 253 76 18 2385
60 S 21 48 96 199 381 677 1139 1623 2038 2291 2367 2385 2385
Corn Growing Degree Days
50 M 300 289 346 394 485 574 715 725 649 539 387 310 5713
50 S 300 589 934 1328 1813 2387 3103 3828 4477 5016 5404 5713 5713
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