Climatological Report (Daily)
Issued by NWS

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000
CDUS46 KMTR 160025
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
425 PM PST FRI DEC 15 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 15 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         60    117 PM  64    1998  55      5       61
  MINIMUM         33    500 AM  26    2005  36     -3       52
  AVERAGE         47                        46      1       57

PRECIPITATION (IN)
  TODAY            0.00                                      2.39
  MONTH TO DATE    0.01                                      3.54
  SINCE OCT 1      2.98                                      8.29
  SINCE JAN 1     31.16                                     22.96

DEGREE DAYS
 HEATING
  TODAY           18                                         8
  MONTH TO DATE  248                                       219
  SINCE DEC 1    248                                       219
  SINCE JUL 1    776                                       723

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


WIND (MPH)
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION  NW (330)
  HIGHEST WIND SPEED     8   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED     9   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED     3.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     53           100 PM
 AVERAGE    77

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   55        69      2011
 MINIMUM TEMPERATURE (F)   36        28      2015
                                             2006


SUNRISE AND SUNSET
DECEMBER 15 2017......SUNRISE   719 AM PST   SUNSET   450 PM PST
DECEMBER 16 2017......SUNRISE   719 AM PST   SUNSET   451 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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