Climatological Report (Daily)
Issued by NWS
Issued by NWS
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729
CDUS46 KMTR 010031
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
531 PM PDT FRI JUL 31 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR JULY 31 2026...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 81 4:04 PM 91 2000 79 2 76
MINIMUM 53 6:55 AM 30 2017 55 -2 58
AVERAGE 67 67 0 67
PRECIPITATION (IN)
TODAY 0.00 0.00
MONTH TO DATE T T
SINCE OCT 1 17.03 16.08
SINCE JAN 1 9.60 8.10
DEGREE DAYS
HEATING
TODAY 0 0
MONTH TO DATE 23 38
SINCE JUN 1 44 102
SINCE JUL 1 23 38
COOLING
TODAY 2 2
MONTH TO DATE 77 12
SINCE JUN 1 116 20
SINCE JAN 1 133 37
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 8.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 6:00 AM
LOWEST 42 2:00 PM
AVERAGE 70
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 92 2000
MINIMUM TEMPERATURE (F) 55 48 2008
SUNRISE AND SUNSET
JULY 31 2026..........SUNRISE 6:11 AM PDT SUNSET 8:19 PM PDT
AUGUST 1 2026........SUNRISE 6:12 AM PDT SUNSET 8:19 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$