514
CDUS46 KMTR 120827
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1227 AM PST FRI DEC 12 2025
...............................
..THE NAPA AIRPORT CLIMATE SUMMARY FOR DECEMBER 11 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 48 3:09 PM 66 2017 58 -10 59
MINIMUM 43 11:59 PM 25 2013 38 5 35
AVERAGE 46 48 -2 47
PRECIPITATION (IN)
YESTERDAY 0.00 0.06
MONTH TO DATE T 0.06
SINCE OCT 1 3.46 4.32
SINCE JAN 1 11.78 18.16
DEGREE DAYS
HEATING
YESTERDAY 19 18
MONTH TO DATE 211 152
SINCE DEC 1 211 152
SINCE JUL 1 686 692
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 E (90)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 13.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 11:00 PM
LOWEST 86 2:00 PM
AVERAGE 93
......................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 58 64 2018
MINIMUM TEMPERATURE (F) 38 26 2013
SUNRISE AND SUNSET
DECEMBER 12 2025......SUNRISE 7:17 AM PST SUNSET 4:49 PM PST
DECEMBER 13 2025......SUNRISE 7:17 AM PST SUNSET 4:50 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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