Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 210826
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
126 AM PDT MON SEP 21 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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 66 4:24 PM 97 2011 80 -14 79
MINIMUM 53 2:05 AM 38 2004 50 3 54
AVERAGE 60 65 -5 67
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE 0.10 T
SINCE OCT 1 17.13 16.08
SINCE JAN 1 9.70 8.10
DEGREE DAYS
HEATING
YESTERDAY 5 0
MONTH TO DATE 25 1
SINCE SEP 1 25 1
SINCE JUL 1 61 46
COOLING
YESTERDAY 0 2
MONTH TO DATE 37 60
SINCE SEP 1 37 60
SINCE JAN 1 211 171
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 8.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 8:00 PM
LOWEST 73 12:00 PM
AVERAGE 83
..........................................................
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 2026.....SUNRISE 6:56 AM PDT SUNSET 7:07 PM PDT
SEPTEMBER 22 2026.....SUNRISE 6:57 AM PDT SUNSET 7:06 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$