National Weather Service Text Product
AFOS product CLISFO
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLISFO
Product Timestamp: 2025-09-12 08:30 UTC
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517
CDUS46 KMTR 120830
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT FRI SEP 12 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 11 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 72 3:05 PM 98 1979 75 -3 67
MINIMUM 62 11:59 PM 49 1951 56 6 53
AVERAGE 67 66 1 60
PRECIPITATION (IN)
YESTERDAY 0.00 0.22 2017 0.00 0.00 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 5
MONTH TO DATE 1 13 -12 27
SINCE SEP 1 1 13 -12 27
SINCE JUL 1 91 115 -24 157
COOLING
YESTERDAY 2 2 0 0
MONTH TO DATE 26 22 4 3
SINCE SEP 1 26 22 4 3
SINCE JAN 1 76 132 -56 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION W (280)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 12.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 11:00 PM
LOWEST 61 12:00 PM
AVERAGE 74
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 100 1979
MINIMUM TEMPERATURE (F) 56 47 1946
1970
SUNRISE AND SUNSET
SEPTEMBER 12 2025.....SUNRISE 6:49 AM PDT SUNSET 7:21 PM PDT
SEPTEMBER 13 2025.....SUNRISE 6:50 AM PDT SUNSET 7:20 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$