PASADENA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046719) PASADENA
From Year=1927 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 465 467 567 648 768 867 1070 1096 1004 858 622 489 8920
40 S 465 931 1498 2146 2915 3781 4851 5947 6951 7809 8431 8920 8920
45 M 313 327 412 498 613 717 915 941 854 703 472 335 7100
45 S 313 639 1052 1549 2163 2879 3794 4735 5589 6292 6764 7100 7100
50 M 174 194 261 349 458 567 760 786 704 548 324 191 5316
50 S 174 369 630 979 1437 2004 2763 3549 4253 4801 5125 5316 5316
55 M 72 88 130 208 304 417 605 631 554 393 185 79 3667
55 S 72 160 290 498 803 1219 1824 2455 3009 3402 3587 3667 3667
60 M 22 30 47 98 164 269 450 476 404 243 80 22 2304
60 S 22 52 99 196 360 629 1079 1554 1959 2202 2283 2304 2304
Corn Growing Degree Days
50 M 266 266 323 376 459 547 703 716 641 529 371 280 5478
50 S 266 532 855 1231 1690 2237 2940 3655 4297 4826 5197 5478 5478
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 Jul 28, 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