Climatological Report (Daily)
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000
CDUS46 KMTR 220852
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
151 AM PDT FRI SEP 22 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR SEPTEMBER 21 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         74    227 PM 102    2003  79     -5       79
  MINIMUM         41R   609 AM  41    2012  48     -7       54
  AVERAGE         58                        64     -6       67

PRECIPITATION (IN)
  YESTERDAY        0.00                                      0.00
  MONTH TO DATE    0.02                                      0.00
  SINCE OCT 1     37.13                                     18.86
  SINCE JAN 1     28.18                                     14.67

DEGREE DAYS
 HEATING
  YESTERDAY        7                                         0
  MONTH TO DATE   20                                        26
  SINCE SEP 1     20                                        26
  SINCE JUL 1     30                                        83

 COOLING
  YESTERDAY        0                                         2
  MONTH TO DATE  117                                        30
  SINCE SEP 1    117                                        30
  SINCE JAN 1    499                                       149
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   5   RESULTANT WIND DIRECTION  SW (240)
  HIGHEST WIND SPEED    23   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED     7.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.1


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           700 AM
 LOWEST     31          1200 PM
 AVERAGE    62

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   79        99      2003
 MINIMUM TEMPERATURE (F)   48        40      2005


SUNRISE AND SUNSET
SEPTEMBER 22 2017.....SUNRISE   657 AM PDT   SUNSET   705 PM PDT
SEPTEMBER 23 2017.....SUNRISE   658 AM PDT   SUNSET   704 PM PDT


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




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