National Weather Service Text Product
AFOS product CLISFO
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLISFO
Product Timestamp: 2025-09-19 08:30 UTC
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154
CDUS46 KMTR 190830
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT FRI SEP 19 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 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 70 12:46 PM 93 2009 75 -5 71
MINIMUM 60 11:59 PM 46 1955 56 4 55
AVERAGE 65 65 0 63
PRECIPITATION (IN)
YESTERDAY 0.02 2.29 1959 0.00 0.02 0.00
MONTH TO DATE 0.04 0.02 0.02 0.00
SINCE OCT 1 16.15 19.59 -3.44 20.23
SINCE JAN 1 7.59 12.62 -5.03 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 2
MONTH TO DATE 2 20 -18 49
SINCE SEP 1 2 20 -18 49
SINCE JUL 1 92 122 -30 179
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 40 36 4 3
SINCE SEP 1 40 36 4 3
SINCE JAN 1 90 146 -56 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 12.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 11:00 PM
LOWEST 68 10:00 AM
AVERAGE 81
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 93 2000
MINIMUM TEMPERATURE (F) 56 46 1947
1954
SUNRISE AND SUNSET
SEPTEMBER 19 2025.....SUNRISE 6:55 AM PDT SUNSET 7:10 PM PDT
SEPTEMBER 20 2025.....SUNRISE 6:56 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.
$$