SAN JUAN CITY, PUERTO RICO

Period of Record General Climate Summary - Cooling Degree Days

From Year=1955 To Year=1977
Station:(668808) SAN JUAN CITY
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
55 650 590 675 682 750 761 783 797 782 794 718 681 8664
57 588 534 613 622 688 701 721 735 722 732 658 619 7933
60 495 449 520 532 595 611 628 642 632 639 568 526 6837
65 340 307 365 382 440 461 473 487 482 484 418 371 5011
70 185 166 210 232 285 311 318 332 332 329 268 216 3184
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