National Weather Service National Headquarters

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
CXUS56 KMTR 011956
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1256 PM PDT WED MAY 1 2013

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              91   MM
 LOW               32   04/06/2012
HIGHEST            87   04/29                         86  04/21
                        04/22
LOWEST             34   04/16                         32  04/06
AVG. MAXIMUM     73.6                               68.0
AVG. MINIMUM     44.1                               44.7
MEAN             58.9                               56.3
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  1
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           0.71              1.04   -0.33     1.72
DAILY AVG.       0.02                               0.06
DAYS >= .01         3                                  6
DAYS >= .10         2                                  4
DAYS >= .50         0                                  2
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.45   03/31 TO 04/01           03/31 TO 04/01
                                                          04/30 TO 04/30
                                                          04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     179                                259
 SINCE 7/1       2744                               2947
COOLING TOTAL       3                                  7
 SINCE 1/1          3                                  7
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
RESULTANT WIND SPEED/DIRECTION   4/260
HIGHEST WIND SPEED/DIRECTION    32/360    DATE  04/30
HIGHEST GUST SPEED/DIRECTION    46/030    DATE  04/12

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          2

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      3
HAZE                      1

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

$$