Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 012218
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
317 PM PDT WED OCT 1 2014

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             102   MM
 LOW               41   09/21/2012
HIGHEST            93   09/10                         96  09/07
LOWEST             45   09/30                         42  09/20
AVG. MAXIMUM     79.6                               80.8
AVG. MINIMUM     52.6                               51.1
MEAN             66.1                               65.9
DAYS MAX >= 90      3                                  2
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           0.31              0.32   -0.01     0.84
DAILY AVG.       0.01                               0.03
DAYS >= .01         3                                  2
DAYS >= .10         1                                  1
DAYS >= .50         0                                  1
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.23   09/25 TO 09/25           09/21 TO 09/21
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL      22                                 28
 SINCE 7/1         44                                 64
COOLING TOTAL      63                                 62
 SINCE 1/1        236                                299
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
RESULTANT WIND SPEED/DIRECTION   6/233
HIGHEST WIND SPEED/DIRECTION    25/200    DATE  09/17
HIGHEST GUST SPEED/DIRECTION    31/190    DATE  09/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      16     FOG W/VIS <= 1/4 MILE      5
HAZE                      0

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

$$


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