National Weather Service Text Product
AFOS product CLISFO
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLISFO
Product Timestamp: 2025-09-20 08:45 UTC
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144
CDUS46 KMTR 200845
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
145 AM PDT SAT SEP 20 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 19 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 2:07 PM 93 2000 75 -3 66
MINIMUM 60 6:16 AM 46 1947 56 4 54
1954
AVERAGE 66 65 1 60
PRECIPITATION (IN)
YESTERDAY 0.00 0.46 1977 0.00 0.00 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 2 -2 5
MONTH TO DATE 2 22 -20 54
SINCE SEP 1 2 22 -20 54
SINCE JUL 1 92 124 -32 184
COOLING
YESTERDAY 1 2 -1 0
MONTH TO DATE 41 38 3 3
SINCE SEP 1 41 38 3 3
SINCE JAN 1 91 148 -57 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION NW (300)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 10.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 66 12:00 PM
AVERAGE 80
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 93 1983
1990
2015
MINIMUM TEMPERATURE (F) 56 48 1947
1954
1965
SUNRISE AND SUNSET
SEPTEMBER 20 2025.....SUNRISE 6:56 AM PDT SUNSET 7:09 PM PDT
SEPTEMBER 21 2025.....SUNRISE 6:57 AM PDT SUNSET 7:07 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$