Climatological Report (Daily)
Issued by NWS
Issued by NWS
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793
CDUS46 KMTR 280835
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
135 AM PDT MON SEP 28 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 27 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 70 5:21 PM 101 2020 79 -9 72
MINIMUM 50 10:46 PM 45 2005 49 1 55
2018
AVERAGE 60 64 -4 64
PRECIPITATION (IN)
YESTERDAY 0.00 0.00
MONTH TO DATE 0.10 0.12
SINCE OCT 1 17.13 16.20
SINCE JAN 1 9.70 8.22
DEGREE DAYS
HEATING
YESTERDAY 5 1
MONTH TO DATE 40 2
SINCE SEP 1 40 2
SINCE JUL 1 76 47
COOLING
YESTERDAY 0 0
MONTH TO DATE 52 85
SINCE SEP 1 52 85
SINCE JAN 1 226 196
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (220)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 9.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 11:00 PM
LOWEST 59 5:00 PM
AVERAGE 78
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 103 2020
MINIMUM TEMPERATURE (F) 49 40 2001
SUNRISE AND SUNSET
SEPTEMBER 28 2026.....SUNRISE 7:02 AM PDT SUNSET 6:56 PM PDT
SEPTEMBER 29 2026.....SUNRISE 7:03 AM PDT SUNSET 6:55 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$