Climatological Report (Daily)
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000
CDUS46 KMTR 180831
CLISFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1231 AM PST MON DEC 18 2017


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1927 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         63    337 PM  67    1958  56      7       52
  MINIMUM         48   1156 PM  30    1965  44      4       38
  AVERAGE         56                        50      6       45

PRECIPITATION (IN)
  YESTERDAY        0.00          1.26 2005   0.13  -0.13     0.00
  MONTH TO DATE    0.03                      2.01  -1.98     3.98
  SINCE OCT 1      3.01                      5.34  -2.33     8.30
  SINCE JAN 1     25.20                     18.63   6.57    20.74

SNOWFALL (IN)
  YESTERDAY        0.0           0.0
  MONTH TO DATE    0.0
  SINCE DEC 1      0.0
  SINCE JUL 1      0.0

DEGREE DAYS
 HEATING
  YESTERDAY        9                        15     -6       20
  MONTH TO DATE  191                       235    -44      206
  SINCE DEC 1    191                       235    -44      206
  SINCE JUL 1    530                       799   -269      620

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    346                       164    182      142
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   5   RESULTANT WIND DIRECTION   N (20)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     N (350)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     N (360)
  AVERAGE WIND SPEED     7.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.3


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    61          1100 PM
 LOWEST     21           200 PM
 AVERAGE    41

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


THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   56        65      1958
 MINIMUM TEMPERATURE (F)   44        30      1965


SUNRISE AND SUNSET
DECEMBER 18 2017......SUNRISE   719 AM PST   SUNSET   453 PM PST
DECEMBER 19 2017......SUNRISE   720 AM PST   SUNSET   454 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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