Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 020359
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
859 PM PDT FRI MAY 1 2015

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF APRIL 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              91   MM
 LOW               32   04/04/2015
                        04/06/2012
                        04/11/1967
HIGHEST            87   04/30                         86  04/30
LOWEST             32R  04/04                         37  04/23
AVG. MAXIMUM     69.1                               69.1
AVG. MINIMUM     41.1                               44.3
MEAN             55.1                               56.7
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      1                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           1.43              1.04    0.39     1.84
DAILY AVG.       0.05                               0.06
DAYS >= .01         3                                  5
DAYS >= .10         3                                  3
DAYS >= .50         1                                  2
DAYS >= 1.00        1                                  0
GREATEST
 24 HR. TOTAL    1.01   04/07 TO 04/07           04/24 TO 04/25
                                                          04/30 TO 04/30
                                                          04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     282                                235
 SINCE 7/1       2305                               2745
COOLING TOTAL       1                                  1
 SINCE 1/1          1                                  1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.2
RESULTANT WIND SPEED/DIRECTION   5/243
HIGHEST WIND SPEED/DIRECTION    32/250    DATE  04/13
HIGHEST GUST SPEED/DIRECTION    42/250    DATE  04/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           20
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      2
HAZE                      2

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

$$



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