Climatological Report (Daily)
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411
CDUS46 KMTR 210845
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
145 AM PDT THU SEP 21 2017


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR SEPTEMBER 20 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         78    110 PM  97    2011  79     -1       78
  MINIMUM         51   1223 AM  38    2004  49      2       51
  AVERAGE         65                        64      1       65

PRECIPITATION (IN)
  YESTERDAY        T                                         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        0                                         0
  MONTH TO DATE   13                                        26
  SINCE SEP 1     13                                        26
  SINCE JUL 1     23                                        83

 COOLING
  YESTERDAY        0                                         0
  MONTH TO DATE  117                                        28
  SINCE SEP 1    117                                        28
  SINCE JAN 1    499                                       147
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED  13   RESULTANT WIND DIRECTION   W (270)
  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    30   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED    13.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83          1200 AM
 LOWEST     43           200 PM
 AVERAGE    63

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


THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   79       102      2003
 MINIMUM TEMPERATURE (F)   48        41      2012


SUNRISE AND SUNSET
SEPTEMBER 21 2017.....SUNRISE   656 AM PDT   SUNSET   707 PM PDT
SEPTEMBER 22 2017.....SUNRISE   657 AM PDT   SUNSET   705 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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