034
CXUS56 KMTR 010844
CLMAPC

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
144 AM PDT WED OCT 01 2025

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            115   MM
 LOW              35   09/29/2019
HIGHEST           96   09/23                          96  09/03
LOWEST            47   09/14                          45  09/08
AVG. MAXIMUM    78.9                                80.1
AVG. MINIMUM    56.6                                51.4
MEAN            67.8                                65.8
DAYS MAX >= 90     2                                   4
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
TOTALS          0.22               0.07    0.15        T
DAILY AVG.      0.01                                   T
DAYS >= .01        4                                   0
DAYS >= .10        0                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.12   09/24 TO 09/25                  T  09/26 TO 09/26
                                                          09/25 TO 09/25
                                                          09/26 TO 09/26


DEGREE DAYS
HEATING TOTAL      2                                  26
 SINCE 7/1        47                                  MM
COOLING TOTAL     90                                  58
 SINCE 1/1       201                                  MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
RESULTANT WIND SPEED/DIRECTION   6/220
HIGHEST WIND SPEED/DIRECTION    31/200    DATE  09/27
HIGHEST GUST SPEED/DIRECTION    39/200    DATE  09/27

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.31
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                6     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      1
HAZE                      4

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

$$