457
CXUS56 KMTR 011630
CLMAPC

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
930 AM PDT MON JUN 01 2026

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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR THE MONTH OF MAY 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            101   MM
 LOW              32   05/10/2022
HIGHEST           89   05/19                          90  05/30
LOWEST            44   05/19                          42  05/04
                                                          05/14
AVG. MAXIMUM    73.0                                75.1
AVG. MINIMUM    49.9                                47.1
MEAN            61.5                                61.1
DAYS MAX >= 90     0                                   1
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
TOTALS          0.64               0.80   -0.16     0.20
DAILY AVG.      0.02                                0.01
DAYS >= .01        3                                  MM
DAYS >= .10        1                                  MM
DAYS >= .50        0                                  MM
DAYS >= 1.00       0                                  MM
GREATEST
 24 HR. TOTAL   0.37   05/04 TO 05/05               0.20  05/12 TO 05/12


DEGREE DAYS
HEATING TOTAL    112                                 130
 SINCE 7/1      2317                                  MM
COOLING TOTAL      9                                  15
 SINCE 1/1        17                                  MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
RESULTANT WIND SPEED/DIRECTION   6/240
HIGHEST WIND SPEED/DIRECTION    32/010    DATE  05/18
HIGHEST GUST SPEED/DIRECTION    45/360    DATE  05/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.37
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

$$