Climatological Report (Daily)
Issued by NWS

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000
CDUS46 KMTR 130050
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
449 PM PST TUE DEC 12 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 12 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   252 PM  60    2010  56      7       57
  MINIMUM         28    743 AM  26    2013  36     -8       42
  AVERAGE         46                        46      0       50

PRECIPITATION (IN)
  TODAY            0.00                                      0.00
  MONTH TO DATE    0.01                                      0.93
  SINCE OCT 1      2.98                                      5.68
  SINCE JAN 1     31.16                                     20.35

DEGREE DAYS
 HEATING
  TODAY           19                                        15
  MONTH TO DATE  189                                       190
  SINCE DEC 1    189                                       190
  SINCE JUL 1    717                                       694

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


WIND (MPH)
  RESULTANT WIND SPEED   2   RESULTANT WIND DIRECTION  NE (40)
  HIGHEST WIND SPEED     7   HIGHEST WIND DIRECTION     E (70)
  HIGHEST GUST SPEED     9   HIGHEST GUST DIRECTION    NE (60)
  AVERAGE WIND SPEED     2.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  FOG
  FOG W/VISIBILITY <= 1/4 MILE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           600 AM
 LOWEST     36           100 PM
 AVERAGE    68

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   56        61      2004
 MINIMUM TEMPERATURE (F)   36        24      2013
                                             2007


SUNRISE AND SUNSET
DECEMBER 12 2017......SUNRISE   717 AM PST   SUNSET   449 PM PST
DECEMBER 13 2017......SUNRISE   717 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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