529
CDUS46 KMTR 180825
CLISJC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
125 AM PDT THU SEP 18 2025
...............................
..THE SAN JOSE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 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 89 2:49 PM 102 1913 81 8 76
MINIMUM 62 6:21 AM 40 1895 57 5 56
AVERAGE 76 69 7 66
PRECIPITATION (IN)
YESTERDAY 0.00 0.34 1986 0.00 0.00 0.00
MONTH TO DATE 0.41 0.02 0.39 0.00
SINCE OCT 1 9.72 13.43 -3.71 17.06
SINCE JAN 1 6.08 9.28 -3.20 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 11 4 7 1
MONTH TO DATE 108 81 27 117
SINCE SEP 1 108 81 27 117
SINCE JAN 1 457 524 -67 927
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 4.3
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 90 6:00 AM
LOWEST 31 4:00 PM
AVERAGE 61
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THE SAN JOSE AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 100 1913
MINIMUM TEMPERATURE (F) 57 42 1907
1908
1911
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:53 AM PDT SUNSET 7:10 PM PDT
SEPTEMBER 19 2025.....SUNRISE 6:53 AM PDT SUNSET 7:09 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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