Climatological Report (Daily)
Issued by NWS

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790
CDUS46 KMTR 180832
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1232 AM PST WED JAN 18 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR JANUARY 17 2017...

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)
 YESTERDAY
  MAXIMUM         53   1227 PM  71    2014  55     -2       62
  MINIMUM         33    356 AM  19    2012  37     -4       53
  AVERAGE         43                        46     -3       58

PRECIPITATION (IN)
  YESTERDAY        0.00                                      1.30
  MONTH TO DATE    7.74                                      4.77
  SINCE OCT 1     16.69                                      8.96
  SINCE JAN 1      7.74                                      4.77

DEGREE DAYS
 HEATING
  YESTERDAY       22                                         7
  MONTH TO DATE  285                                       278
  SINCE DEC 1    830                                       856
  SINCE JUL 1   1334                                      1397

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


WIND (MPH)
  RESULTANT WIND SPEED   7   RESULTANT WIND DIRECTION   E (90)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     E (90)
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION     E (90)
  AVERAGE WIND SPEED     8.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    92           200 AM
 LOWEST     63          1200 PM
 AVERAGE    78

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   55        70      2014
                                             2009
 MINIMUM TEMPERATURE (F)   37        24      2001


SUNRISE AND SUNSET
JANUARY 18 2017.......SUNRISE   723 AM PST   SUNSET   517 PM PST
JANUARY 19 2017.......SUNRISE   723 AM PST   SUNSET   518 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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