Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 170828
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
128 AM PDT SUN AUG 17 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 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 2:26 PM 90 2015 73 1 72
MINIMUM 62 11:59 PM 48 1952 57 5 51
1955
AVERAGE 68 65 3 62
PRECIPITATION (IN)
YESTERDAY 0.00 0.04 2020 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 3
MONTH TO DATE 17 26 -9 65
SINCE JUN 1 229 181 48 228
SINCE JUL 1 86 84 2 115
COOLING
YESTERDAY 3 1 2 0
MONTH TO DATE 9 16 -7 0
SINCE JUN 1 11 65 -54 49
SINCE JAN 1 17 85 -68 60
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 18 RESULTANT WIND DIRECTION W (270)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 18.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 1:00 AM
LOWEST 68 5:00 PM
AVERAGE 79
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 82 1988
1993
2020
MINIMUM TEMPERATURE (F) 57 48 1945
1952
SUNRISE AND SUNSET
AUGUST 17 2025........SUNRISE 6:27 AM PDT SUNSET 7:59 PM PDT
AUGUST 18 2025........SUNRISE 6:28 AM PDT SUNSET 7:58 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$