305
CDCA42 TJSJ 180906
CLISJU
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
506 AM AST THU DEC 18 2025
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..THE SAN JUAN AREA/PR CLIMATE SUMMARY FOR DECEMBER 17 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1898 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
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TEMPERATURE (F)
YESTERDAY
MAXIMUM 86 3:48 PM 90 1987 84 2 87
MINIMUM 74 7:30 AM 65 1916 73 1 77
AVERAGE 80 79 1 82
PRECIPITATION (IN)
YESTERDAY 0.23 1.26 1948 0.15 0.08 0.21
MONTH TO DATE 1.76 2.92 -1.16 1.45
SINCE DEC 1 1.76 2.92 -1.16 1.45
SINCE JAN 1 62.48 57.94 4.54 75.68
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 15 14 1 17
MONTH TO DATE 263 238 25 288
SINCE DEC 1 263 238 25 288
SINCE JAN 1 5969 5611 358 6555
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WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 5.6
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94
LOWEST 53
AVERAGE 74
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THE SAN JUAN AREA/PR CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 84 89 1980
MINIMUM TEMPERATURE (F) 73 65 1958
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 6:50 AM AST SUNSET 5:52 PM AST
DECEMBER 19 2025......SUNRISE 6:50 AM AST SUNSET 5:52 PM AST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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