Climatological Report (Monthly)
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000
CXUS56 KMTR 012243
CLMAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
343 PM PDT MON OCT 1 2018

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             107   MM
 LOW               39   09/16/2018
                        09/22/2017
                        01/01/2000
HIGHEST            87   09/20                        107  09/02
LOWEST             39R  09/16                         39  09/22
AVG. MAXIMUM     77.0                               84.1
AVG. MINIMUM     47.9                               52.0
MEAN             62.5                               68.1
DAYS MAX >= 90      0                                  7
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  0
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS              T              0.32   -0.32     0.02
DAILY AVG.          T                               0.00
DAYS >= .01         0                                  1
DAYS >= .10         0                                  0
DAYS >= .50         0                                  0
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL       T   09/05 TO 09/05           09/11 TO 09/11
                                                          09/30 TO 09/30EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                                                          09/30 TO 09/30EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S

DEGREE_DAYS
HEATING TOTAL      70                                 37
 SINCE 7/1        111                                 47
COOLING TOTAL       2                                132
 SINCE 1/1        154                                514
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.0
RESULTANT WIND SPEED/DIRECTION   5/218
HIGHEST WIND SPEED/DIRECTION    22/260    DATE  09/15
HIGHEST GUST SPEED/DIRECTION    34/200    DATE  09/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           21
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  0
  0
  0
  0
  0
  3
HAZE                      1

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

$$


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