Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 210830
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT SUN SEP 21 2025
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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 79 5:13 PM 97 2011 80 -1 70
MINIMUM 54 7:21 AM 38 2004 50 4 54
AVERAGE 67 65 2 62
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE T T
SINCE OCT 1 16.08 19.88
SINCE JAN 1 8.10 13.84
DEGREE DAYS
HEATING
YESTERDAY 0 3
MONTH TO DATE 1 18
SINCE SEP 1 1 18
SINCE JUL 1 46 31
COOLING
YESTERDAY 2 0
MONTH TO DATE 60 36
SINCE SEP 1 60 36
SINCE JAN 1 171 337
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (230)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 6.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 5:00 AM
LOWEST 45 4:00 PM
AVERAGE 73
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 102 2003
MINIMUM TEMPERATURE (F) 50 41 2012
2017
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 6:56 AM PDT SUNSET 7:07 PM PDT
SEPTEMBER 22 2025.....SUNRISE 6:57 AM PDT SUNSET 7:05 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$