Climatological Report (Daily)
Issued by NWS

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CDUS46 KMTR 180827
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1227 AM PST THU DEC 18 2014


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 17 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         57    223 PM  66    2000  55      2       64
  MINIMUM         43   1218 AM  24    2008  36      7       35
  AVERAGE         50                        45      5       50

PRECIPITATION (IN)
  YESTERDAY        0.23                                      0.00
  MONTH TO DATE    9.29                                      0.47
  SINCE JUL 1     11.92                                      2.20
  SINCE JAN 1     20.19                                      4.17

DEGREE DAYS
 HEATING
  YESTERDAY       15                                        15
  MONTH TO DATE  182                                       405
  SINCE DEC 1    182                                       405
  SINCE JUL 1    655                                      1084

 COOLING
  YESTERDAY        0                                         0
  MONTH TO DATE    0                                         0
  SINCE DEC 1      0                                         0
  SINCE JAN 1    267                                       303
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION   S (160)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     E (90)
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION     E (80)
  AVERAGE WIND SPEED     5.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     83           300 PM
 AVERAGE    92

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   55        62      2003
 MINIMUM TEMPERATURE (F)   36        21      2006


SUNRISE AND SUNSET
DECEMBER 18 2014......SUNRISE   720 AM PST   SUNSET   451 PM PST
DECEMBER 19 2014......SUNRISE   721 AM PST   SUNSET   452 PM PST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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