SAN JUAN WSFO, PUERTO RICO

Period of Record General Climate Summary - Cooling Degree Days

From Year=1956 To Year=2012
Station:(668812) SAN JUAN WSFO
Averages Daily Extremes
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 679 625 715 732 803 820 855 862 828 834 747 714 9214
57 617 568 653 672 741 760 793 800 768 772 687 652 8484
60 524 483 560 582 648 670 700 707 678 679 597 559 7388
65 369 342 405 432 493 520 545 552 528 524 447 404 5562
70 214 201 250 282 338 370 390 397 378 369 297 249 3735
Cooling 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.
Table updated on May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster