Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 220028
CLIAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
528 PM PDT MON SEP 21 2026
...................................
...THE NAPA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 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 67 3:30 PM 102 2003 80 -13 77
MINIMUM 56 9:14 AM 41 2012 50 6 53
2017
AVERAGE 62 65 -3 65
PRECIPITATION (IN)
TODAY 0.00 0.00
MONTH TO DATE 0.10 T
SINCE OCT 1 17.13 16.08
SINCE JAN 1 9.70 8.10
DEGREE DAYS
HEATING
TODAY 3 0
MONTH TO DATE 28 1
SINCE SEP 1 28 1
SINCE JUL 1 64 46
COOLING
TODAY 0 0
MONTH TO DATE 37 60
SINCE SEP 1 37 60
SINCE JAN 1 211 171
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION SW (230)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 9.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 68 2:00 PM
AVERAGE 81
..........................................................
THE NAPA AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 99 2003
MINIMUM TEMPERATURE (F) 50 39 2017
SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE 6:56 AM PDT SUNSET 7:07 PM PDT
SEPTEMBER 22 2026.....SUNRISE 6:57 AM PDT SUNSET 7:06 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$