Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 011005
CLMSJC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
203 AM PST MON JAN 1 2018

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

...THE SAN JOSE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              79   12/12/1958
 LOW               19   12/23/1990
                        12/22/1990
HIGHEST            70   12/10                         68  12/09
LOWEST             34   12/22        MM               30  12/19
                                                          12/18
AVG. MAXIMUM     63.9              58.0     5.9     59.1
AVG. MINIMUM     39.7              41.9    -2.2     41.7
MEAN             51.8                               50.4
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  3
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM           MM   MM
 MINIMUM           MM   MM
TOTALS           0.07              2.61   -2.54     1.51
DAILY AVG.       0.00              0.08   -0.08     0.05
DAYS >= .01         1                                  5
DAYS >= .10         0                                  3
DAYS >= .50         0                                  2
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.07   12/20 TO 12/20           12/23 TO 12/23
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31

DEGREE_DAYS
HEATING TOTAL     401               467     -66      444
 SINCE 7/1        618               874    -256      667
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        992               637     355      706
..................................................

WIND (MPH)
AVERAGE WIND SPEED              3.6
RESULTANT WIND SPEED/DIRECTION   1/298
HIGHEST WIND SPEED/DIRECTION    30/030    DATE  12/04
HIGHEST GUST SPEED/DIRECTION    39/030    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             19
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      7

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

$$


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