Climatological Report (Monthly)
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000
CXUS56 KMTR 020929
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
218 AM PDT TUE MAY 2 2017

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              91   MM
 LOW               32   04/04/2015
                        04/06/2012
                        04/11/1967
HIGHEST            81   04/30                         86  04/06
                        04/29
LOWEST             36   04/14                         36  04/26
                                                          04/15
AVG. MAXIMUM     69.2                               70.0
AVG. MINIMUM     46.2                               44.8
MEAN             57.7                               57.4
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           3.11              1.04    2.07     0.94
DAILY AVG.       0.10                               0.03
DAYS >= .01        11                                  5
DAYS >= .10         6                                  2
DAYS >= .50         2                                  1
DAYS >= 1.00        1                                  0
GREATEST
 24 HR. TOTAL    1.52   04/06 TO 04/07           04/08 TO 04/09
                                                          04/30 TO 04/30
                                                          04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     214                                219
 SINCE 7/1       2362                               2444
COOLING TOTAL       2                                  0
 SINCE 1/1          2                                  0
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.2
RESULTANT WIND SPEED/DIRECTION   4/247
HIGHEST WIND SPEED/DIRECTION    29/280    DATE  04/23
HIGHEST GUST SPEED/DIRECTION    35/270    DATE  04/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       6
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      2
HAZE                      6

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

$$



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