432
CDUS46 KMTR 170830
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT WED SEP 17 2025
...............................
..THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 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 87R 3:45 PM 85 2004 80 7 72
MINIMUM 55 7:22 AM 38 2006 51 4 54
AVERAGE 71 66 5 63
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 2
MONTH TO DATE 1 8
SINCE SEP 1 1 8
SINCE JUL 1 46 21
COOLING
YESTERDAY 6 0
MONTH TO DATE 46 36
SINCE SEP 1 46 36
SINCE JAN 1 157 337
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (190)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 4.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 6:00 AM
LOWEST 43 1:00 PM
AVERAGE 68
......................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 94 2000
MINIMUM TEMPERATURE (F) 51 42 2006
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 6:53 AM PDT SUNSET 7:13 PM PDT
SEPTEMBER 18 2025.....SUNRISE 6:54 AM PDT SUNSET 7:12 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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