Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 120838
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
138 AM PDT SAT SEP 12 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 11 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 73 4:51 PM 98 2017 81 -8 75
MINIMUM 54 1:41 AM 40 2005 52 2 62
AVERAGE 64 66 -2 69
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 1 0
MONTH TO DATE 11 1
SINCE SEP 1 11 1
SINCE JUL 1 47 46
COOLING
YESTERDAY 0 4
MONTH TO DATE 35 27
SINCE SEP 1 35 27
SINCE JAN 1 209 138
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (230)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 9.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 7:00 AM
LOWEST 64 1:00 PM
AVERAGE 79
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 99 2003
MINIMUM TEMPERATURE (F) 52 40 2005
SUNRISE AND SUNSET
SEPTEMBER 12 2026.....SUNRISE 6:48 AM PDT SUNSET 7:22 PM PDT
SEPTEMBER 13 2026.....SUNRISE 6:49 AM PDT SUNSET 7:20 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$