570
CDUS46 KMTR 100828
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
128 AM PDT WED SEP 10 2025
...............................
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 9 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1927 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 73 2:07 PM 92 1951 75 -2 69
MINIMUM 64 6:35 AM 46 1946 56 8 53
AVERAGE 69 66 3 61
PRECIPITATION (IN)
YESTERDAY 0.02 0.26 1978 0.00 0.02 0.00
MONTH TO DATE 0.02 0.01 0.01 0.00
SINCE OCT 1 16.13 19.58 -3.45 20.23
SINCE JAN 1 7.57 12.61 -5.04 14.90
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE SEP 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 4
MONTH TO DATE 1 11 -10 17
SINCE SEP 1 1 11 -10 17
SINCE JUL 1 91 113 -22 147
COOLING
YESTERDAY 4 2 2 0
MONTH TO DATE 22 18 4 3
SINCE SEP 1 22 18 4 3
SINCE JAN 1 72 128 -56 77
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WIND (MPH)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION SW (230)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 8.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 64 1:00 PM
AVERAGE 79
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THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 94 1979
MINIMUM TEMPERATURE (F) 56 49 1947
SUNRISE AND SUNSET
SEPTEMBER 10 2025.....SUNRISE 6:48 AM PDT SUNSET 7:24 PM PDT
SEPTEMBER 11 2025.....SUNRISE 6:48 AM PDT SUNSET 7:23 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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