Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 011553
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
743 AM PST WED FEB 1 2017

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             122   MM
 LOW               19   01/17/2012
HIGHEST            64   01/08                         64  01/27
LOWEST             27   01/06                         25  01/01
AVG. MAXIMUM     57.2                               57.0
AVG. MINIMUM     39.8                               42.9
MEAN             48.5                               50.0
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      2                                  1
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS          12.11              4.38    7.73     6.33
DAILY AVG.       0.39                               0.20
DAYS >= .01        16                                 18
DAYS >= .10        14                                 13
DAYS >= .50         7                                  5
DAYS >= 1.00        5                                  2
GREATEST
 24 HR. TOTAL    2.41   01/09 TO 01/10           01/17 TO 01/18
                                                          01/31 TO 01/31
                                                          01/31 TO 01/31

DEGREE_DAYS
HEATING TOTAL     506                                457
 SINCE 7/1       1555                               1576
COOLING TOTAL       0                                  0
 SINCE 1/1          0                                  0
..................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
RESULTANT WIND SPEED/DIRECTION   2/143
HIGHEST WIND SPEED/DIRECTION    35/210    DATE  01/10
HIGHEST GUST SPEED/DIRECTION    42/210    DATE  01/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN               11     RAIN                      12
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      27     FOG W/VIS <= 1/4 MILE      6
HAZE                      5

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

$$


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