Climatological Report (Daily)
Issued by NWS
Issued by NWS
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781
CDUS46 KMTR 220028
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
528 PM PDT THU AUG 21 2025
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR AUGUST 21 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 91 3:33 PM 93 2020 81 10 75
MINIMUM 54 7:02 AM 47 2001 54 0 53
AVERAGE 73 67 6 64
PRECIPITATION (IN)
TODAY 0.00 0.00
MONTH TO DATE 0.00 0.00
SINCE OCT 1 16.08 19.88
SINCE JAN 1 8.10 13.84
DEGREE DAYS
HEATING
TODAY 0 1
MONTH TO DATE 7 7
SINCE JUN 1 109 49
SINCE JUL 1 45 12
COOLING
TODAY 8 0
MONTH TO DATE 50 50
SINCE JUN 1 70 264
SINCE JAN 1 87 274
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 5.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 35 2:00 PM
AVERAGE 64
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 97 1999
MINIMUM TEMPERATURE (F) 54 45 2006
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:30 AM PDT SUNSET 7:54 PM PDT
AUGUST 22 2025........SUNRISE 6:30 AM PDT SUNSET 7:53 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$