640
CXUS56 KMTR 010832
CLMAPC

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
132 AM PDT SAT AUG 01 2026

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF JULY 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            106   MM
 LOW              30   07/31/2017
HIGHEST           89   07/13                          85  07/10
                       07/21
LOWEST            48   07/11                          44  07/05
AVG. MAXIMUM    78.5                                73.8
AVG. MINIMUM    54.4                                54.0
MEAN            66.5                                63.9
DAYS MAX >= 90     0                                   0
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
TOTALS             TR              0.01   -0.01        T
DAILY AVG.         T                                   T
DAYS >= .01        0                                   0
DAYS >= .10        0                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL      T   07/10 TO 07/10                  T  07/26 TO 07/26
                                                          07/25 TO 07/25
                                                          07/26 TO 07/26


DEGREE DAYS
HEATING TOTAL     23                                  38
 SINCE 7/1        23                                  MM
COOLING TOTAL     77                                  12
 SINCE 1/1       133                                  MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.0
RESULTANT WIND SPEED/DIRECTION   9/220
HIGHEST WIND SPEED/DIRECTION    24/190    DATE  07/01
HIGHEST GUST SPEED/DIRECTION    31/200    DATE  07/01
                                31/200          07/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.21
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$