307
CDUS46 KMTR 130837
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
137 AM PDT SAT SEP 13 2025
...............................
..THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 12 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 74 3:08 PM 99 2003 81 -7 82
MINIMUM 57 5:21 AM 40 2005 52 5 47
AVERAGE 66 66 0 65
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE T 0.00
SINCE OCT 1 16.08 19.88
SINCE JAN 1 8.10 13.84
DEGREE DAYS
HEATING
YESTERDAY 0 0
MONTH TO DATE 1 2
SINCE SEP 1 1 2
SINCE JUL 1 46 15
COOLING
YESTERDAY 1 0
MONTH TO DATE 28 33
SINCE SEP 1 28 33
SINCE JAN 1 139 334
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 9.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 2:00 AM
LOWEST 61 3:00 PM
AVERAGE 77
......................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 100 2003
MINIMUM TEMPERATURE (F) 51 46 2002
SUNRISE AND SUNSET
SEPTEMBER 13 2025.....SUNRISE 6:49 AM PDT SUNSET 7:20 PM PDT
SEPTEMBER 14 2025.....SUNRISE 6:50 AM PDT SUNSET 7:18 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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