Climatological Report (Daily)
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692
CDUS46 KMTR 170829
CLISFO


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1227 AM PST SUN DEC 17 2017


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 16 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         64    329 PM  70    1998  56      8       54
  MINIMUM         49    501 AM  33    1965  44      5       45
  AVERAGE         57                        50      7       50

PRECIPITATION (IN)
  YESTERDAY        0.00          2.10 2002   0.13  -0.13     0.00
  MONTH TO DATE    0.03                      1.88  -1.85     3.98
  SINCE OCT 1      3.01                      5.21  -2.20     8.30
  SINCE JAN 1     25.20                     18.50   6.70    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        8                        15     -7       15
  MONTH TO DATE  182                       220    -38      186
  SINCE DEC 1    182                       220    -38      186
  SINCE JUL 1    521                       784   -263      600

 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  15   RESULTANT WIND DIRECTION  NW (330)
  HIGHEST WIND SPEED    31   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    40   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    16.8


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    83          1200 AM
 LOWEST     21          1100 AM
 AVERAGE    52

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


THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   56        67      1958
 MINIMUM TEMPERATURE (F)   44        30      1965


SUNRISE AND SUNSET
DECEMBER 17 2017......SUNRISE   719 AM PST   SUNSET   453 PM PST
DECEMBER 18 2017......SUNRISE   719 AM PST   SUNSET   453 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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