National Weather Service Text Product
AFOS product CLISFO
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLISFO
Product Timestamp: 2025-09-17 08:30 UTC
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433
CDUS46 KMTR 170830
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT WED SEP 17 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 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 74 1:32 PM 90 1968 75 -1 67
MINIMUM 60 11:59 PM 49 2006 56 4 54
AVERAGE 67 66 1 61
PRECIPITATION (IN)
YESTERDAY 0.00 0.88 1989 0.00 0.00 0.00
MONTH TO DATE 0.02 0.02 0.00 0.00
SINCE OCT 1 16.13 19.59 -3.46 20.23
SINCE JAN 1 7.57 12.62 -5.05 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 2 18 -16 42
SINCE SEP 1 2 18 -16 42
SINCE JUL 1 92 120 -28 172
COOLING
YESTERDAY 2 2 0 0
MONTH TO DATE 36 32 4 3
SINCE SEP 1 36 32 4 3
SINCE JAN 1 86 142 -56 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION NW (300)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 12.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 3:00 AM
LOWEST 57 11:00 AM
AVERAGE 74
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 94 1984
MINIMUM TEMPERATURE (F) 56 50 1945
1946
1988
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 6:53 AM PDT SUNSET 7:14 PM PDT
SEPTEMBER 18 2025.....SUNRISE 6:54 AM PDT SUNSET 7:12 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$