909
CDUS46 KMTR 200836
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
136 AM PDT WED AUG 20 2025
...............................
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 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 73 1:06 PM 89 1964 74 -1 70
MINIMUM 58 5:56 AM 49 1955 57 1 52
AVERAGE 66 65 1 61
PRECIPITATION (IN)
YESTERDAY 0.00 0.56 1997 0.00 0.00 0.00
MONTH TO DATE T 0.02 -0.02 T
SINCE OCT 1 16.11 19.55 -3.44 20.13
SINCE JAN 1 7.55 12.58 -5.03 14.80
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE JUN 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 4
MONTH TO DATE 17 29 -12 71
SINCE JUN 1 229 184 45 234
SINCE JUL 1 86 87 -1 121
COOLING
YESTERDAY 1 1 0 0
MONTH TO DATE 12 19 -7 1
SINCE JUN 1 14 68 -54 50
SINCE JAN 1 20 88 -68 61
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION W (280)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 13.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 6:00 AM
LOWEST 49 1:00 PM
AVERAGE 70
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THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 2023
MINIMUM TEMPERATURE (F) 57 47 1955
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 6:30 AM PDT SUNSET 7:55 PM PDT
AUGUST 21 2025........SUNRISE 6:31 AM PDT SUNSET 7:54 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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