Climatological Report (Daily)
Issued by NWS

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CDUS46 KMTR 150038
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
437 PM PST THU DEC 14 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 14 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         63R   324 PM  62    2016  56      7       62
  MINIMUM         27    745 AM  24    2008  36     -9       51
  AVERAGE         45                        46     -1       57

PRECIPITATION (IN)
  TODAY            0.00                                      0.17
  MONTH TO DATE    0.01                                      1.15
  SINCE OCT 1      2.98                                      5.90
  SINCE JAN 1     31.16                                     20.57

DEGREE DAYS
 HEATING
  TODAY           20                                         8
  MONTH TO DATE  230                                       211
  SINCE DEC 1    230                                       211
  SINCE JUL 1    758                                       715

 COOLING
  TODAY            0                                         0
  MONTH TO DATE    0                                         0
  SINCE DEC 1      0                                         0
  SINCE JAN 1    530                                       186
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION   E (90)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION     E (100)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     E (90)
  AVERAGE WIND SPEED     4.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           700 AM
 LOWEST     39           200 PM
 AVERAGE    70

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   55        64      1998
 MINIMUM TEMPERATURE (F)   36        26      2005


SUNRISE AND SUNSET
DECEMBER 14 2017......SUNRISE   718 AM PST   SUNSET   450 PM PST
DECEMBER 15 2017......SUNRISE   719 AM PST   SUNSET   450 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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