Climatological Report (Daily)
Issued by NWS
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905
CDUS46 KMTR 200825
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
125 AM PDT SUN SEP 20 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 19 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 75 4:01 PM 97 2002 80 -5 78
MINIMUM 52 4:53 AM 41 2008 51 1 58
AVERAGE 64 65 -1 68
PRECIPITATION (IN)
YESTERDAY 0.00 T
MONTH TO DATE 0.10 T
SINCE OCT 1 17.13 16.08
SINCE JAN 1 9.70 8.10
DEGREE DAYS
HEATING
YESTERDAY 1 0
MONTH TO DATE 20 1
SINCE SEP 1 20 1
SINCE JUL 1 56 46
COOLING
YESTERDAY 0 3
MONTH TO DATE 37 58
SINCE SEP 1 37 58
SINCE JAN 1 211 169
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 5.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 3:00 AM
LOWEST 55 3:00 PM
AVERAGE 78
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 97 2011
MINIMUM TEMPERATURE (F) 50 38 2004
SUNRISE AND SUNSET
SEPTEMBER 20 2026.....SUNRISE 6:55 AM PDT SUNSET 7:09 PM PDT
SEPTEMBER 21 2026.....SUNRISE 6:56 AM PDT SUNSET 7:07 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$