Climatological Report (Daily)
Issued by NWS San Juan, PR

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CDCA42 TJSJ 180431
CLISJU


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN JUAN, PR
1231 AM AST MON DEC 18 2017


...................................

...THE SAN JUAN AREA/PR CLIMATE SUMMARY FOR DECEMBER 17 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1898 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         84   1250 PM  90    1987  84      0       86
  MINIMUM         76    219 AM  65    1916  73      3       76
  AVERAGE         80                        79      1       81

PRECIPITATION (IN)
  YESTERDAY        0.07          1.26 1948   0.16  -0.09     0.92
  MONTH TO DATE    2.12                      2.86  -0.74     2.88
  SINCE DEC 1      2.12                      2.86  -0.74     2.88
  SINCE JAN 1     73.36                     54.19  19.17    69.69

SNOWFALL (IN)
  YESTERDAY        0.0                       0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  SINCE DEC 1      0.0                       0.0    0.0      0.0
  SINCE JUL 1      0.0                       0.0    0.0      0.0

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       16
  MONTH TO DATE  267                       238     29      284
  SINCE DEC 1    267                       238     29      284
  SINCE JAN 1   5929                      5664    265     5945
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     E (80)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION     E (80)
  AVERAGE WIND SPEED    13.7


SKY COVER
  AVERAGE SKY COVER 0.6


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  RAIN
  LIGHT RAIN
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    91
 LOWEST     74
 AVERAGE    83

..........................................................


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 2017......SUNRISE   650 AM AST   SUNSET   552 PM AST
DECEMBER 19 2017......SUNRISE   650 AM AST   SUNSET   552 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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