Climatological Report (Daily)
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336
CDUS46 KMTR 040842
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
142 AM PDT THU SEP 04 2025
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 3 2025...
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)
YESTERDAY
MAXIMUM 80 2:59 PM 96 2008 81 -1 96
2024
MINIMUM 52 6:58 AM 44 2000 53 -1 49
AVERAGE 66 67 -1 73
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE T 0.00
SINCE OCT 1 16.08 19.88
SINCE JAN 1 8.10 13.84
DEGREE DAYS
HEATING
YESTERDAY 0 0
MONTH TO DATE 0 0
SINCE SEP 1 0 0
SINCE JUL 1 45 13
COOLING
YESTERDAY 1 8
MONTH TO DATE 10 12
SINCE SEP 1 10 12
SINCE JAN 1 121 313
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 6.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 4:00 AM
LOWEST 44 2:00 PM
AVERAGE 72
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 100 2004
2022
MINIMUM TEMPERATURE (F) 53 43 2000
SUNRISE AND SUNSET
SEPTEMBER 4 2025.....SUNRISE 6:42 AM PDT SUNSET 7:34 PM PDT
SEPTEMBER 5 2025.....SUNRISE 6:43 AM PDT SUNSET 7:32 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$