Climatological Report (Monthly)
Issued by NWS

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000
CXUS56 KMTR 011620
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
816 AM PST THU FEB 1 2018

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              80   01/12/2009
 LOW               18   01/15/2007
HIGHEST            67   01/31                         64  01/08
LOWEST             29   01/21                         27  01/06
                        01/20
AVG. MAXIMUM     58.7                               57.2
AVG. MINIMUM     39.7                               39.8
MEAN             49.2                               48.5
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      4                                  2
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           3.60              4.38   -0.78    12.11
DAILY AVG.       0.12                               0.39
DAYS >= .01        10                                 16
DAYS >= .10         8                                 14
DAYS >= .50         1                                  7
DAYS >= 1.00        1                                  5
GREATEST
 24 HR. TOTAL    2.04   01/08 TO 01/08           01/09 TO 01/10

DEGREE_DAYS
HEATING TOTAL     482                                506
 SINCE 7/1       1558                               1555
COOLING TOTAL       0                                  0
 SINCE 1/1          0                                  0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.7
RESULTANT WIND SPEED/DIRECTION   2/094
HIGHEST WIND SPEED/DIRECTION    29/230    DATE  01/24
HIGHEST GUST SPEED/DIRECTION    38/070    DATE  01/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     84

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

$$




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