943
CDUS46 KMTR 220838
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1238 AM PST MON DEC 22 2025
...............................
..THE NAPA AIRPORT CLIMATE SUMMARY FOR DECEMBER 21 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 62 1:36 PM 71 1999 57 5 53
MINIMUM 58 11:21 PM 21 1998 37 21 40
AVERAGE 60 47 13 47
PRECIPITATION (IN)
YESTERDAY 0.33 0.07
MONTH TO DATE 0.90 1.20
SINCE OCT 1 4.36 5.46
SINCE JAN 1 12.68 19.30
DEGREE DAYS
HEATING
YESTERDAY 5 18
MONTH TO DATE 360 251
SINCE DEC 1 360 251
SINCE JUL 1 835 791
COOLING
YESTERDAY 0 0
MONTH TO DATE 0 0
SINCE DEC 1 0 0
SINCE JAN 1 211 444
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 12.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 12:00 AM
LOWEST 87 2:00 PM
AVERAGE 94
......................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 56 68 1999
MINIMUM TEMPERATURE (F) 37 19 1998
SUNRISE AND SUNSET
DECEMBER 22 2025......SUNRISE 7:23 AM PST SUNSET 4:53 PM PST
DECEMBER 23 2025......SUNRISE 7:23 AM PST SUNSET 4:54 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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