Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 210830
CLISJC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT SUN SEP 21 2025
...................................
...THE SAN JOSE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1893 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 80 12:58 PM 100 1939 80 0 79
MINIMUM 63 11:59 PM 40 1895 57 6 61
AVERAGE 72 69 3 70
PRECIPITATION (IN)
YESTERDAY 0.00 0.02 2005 0.00 0.00 0.00
MONTH TO DATE 0.41 0.03 0.38 0.00
SINCE OCT 1 9.72 13.44 -3.72 17.06
SINCE JAN 1 6.08 9.29 -3.21 13.63
SNOWFALL (IN)
YESTERDAY MM 0.0 1947
MONTH TO DATE T
SINCE SEP 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JUL 1 1 6 -5 0
COOLING
YESTERDAY 7 4 3 5
MONTH TO DATE 131 93 38 131
SINCE SEP 1 131 93 38 131
SINCE JAN 1 480 536 -56 941
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION NW (330)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 6.0
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 84 4:00 AM
LOWEST 62 11:00 AM
AVERAGE 73
..........................................................
THE SAN JOSE AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 101 1928
1939
MINIMUM TEMPERATURE (F) 57 39 1893
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 6:55 AM PDT SUNSET 7:05 PM PDT
SEPTEMBER 22 2025.....SUNRISE 6:56 AM PDT SUNSET 7:04 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$