Climatological Report (Daily)
Issued by NWS
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CDUS46 KMTR 050829
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
129 AM PDT SAT SEP 05 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 4 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 3:31 PM 100 2004 81 -6 76
2022
MINIMUM 52 4:33 AM 43 2000 53 -1 55
AVERAGE 64 67 -3 66
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 4 0
SINCE SEP 1 4 0
SINCE JUL 1 40 45
COOLING
YESTERDAY 0 1
MONTH TO DATE 0 11
SINCE SEP 1 0 11
SINCE JAN 1 174 122
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (240)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 8.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
FOG W/VISIBILITY <= 1/4 MILE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 3:00 AM
LOWEST 46 4:00 PM
AVERAGE 73
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 111 2022
MINIMUM TEMPERATURE (F) 53 44 2005
2010
2015
SUNRISE AND SUNSET
SEPTEMBER 5 2026.....SUNRISE 6:42 AM PDT SUNSET 7:32 PM PDT
SEPTEMBER 6 2026.....SUNRISE 6:43 AM PDT SUNSET 7:31 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$