Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 200831
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
131 AM PDT THU AUG 20 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR AUGUST 19 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 74 4:23 PM 84 2013 80 -6 78
2024
MINIMUM 56 11:41 PM 48 1999 54 2 48
2025
AVERAGE 65 67 -2 63
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE T 0.00
SINCE OCT 1 17.03 16.08
SINCE JAN 1 9.60 8.10
DEGREE DAYS
HEATING
YESTERDAY 0 2
MONTH TO DATE 5 7
SINCE JUN 1 49 109
SINCE JUL 1 28 45
COOLING
YESTERDAY 0 0
MONTH TO DATE 22 37
SINCE JUN 1 138 57
SINCE JAN 1 155 74
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 8.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1:00 AM
LOWEST 57 3:00 PM
AVERAGE 75
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 95 2023
MINIMUM TEMPERATURE (F) 54 46 2000
SUNRISE AND SUNSET
AUGUST 20 2026........SUNRISE 6:28 AM PDT SUNSET 7:56 PM PDT
AUGUST 21 2026........SUNRISE 6:29 AM PDT SUNSET 7:54 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$