Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS46 KMTR 180833
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
133 AM PDT MON AUG 18 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 17 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 12:50 PM 82 1988 73 -1 73
1993
2020
MINIMUM 60 6:20 AM 48 1945 57 3 58
1952
AVERAGE 66 65 1 66
PRECIPITATION (IN)
YESTERDAY 0.00 0.03 1976 0.00 0.00 T
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 0
MONTH TO DATE 17 27 -10 65
SINCE JUN 1 229 182 47 228
SINCE JUL 1 86 85 1 115
COOLING
YESTERDAY 1 1 0 1
MONTH TO DATE 10 17 -7 1
SINCE JUN 1 12 66 -54 50
SINCE JAN 1 18 86 -68 61
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 15 RESULTANT WIND DIRECTION W (270)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 15.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 2:00 AM
LOWEST 61 12:00 PM
AVERAGE 76
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 85 1978
MINIMUM TEMPERATURE (F) 57 48 1957
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:28 AM PDT SUNSET 7:58 PM PDT
AUGUST 19 2025........SUNRISE 6:29 AM PDT SUNSET 7:56 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$