Climatological Report (Daily)
Issued by NWS
Issued by NWS
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839
CDUS46 KMTR 190035
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
535 PM PDT MON AUG 18 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 18 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 74 2:09 PM 85 1978 74 0 69
MINIMUM 58 6:02 AM 48 1957 57 1 56
AVERAGE 66 65 1 63
PRECIPITATION (IN)
TODAY 0.00 0.35 1976 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)
TODAY MM 0.0
MONTH TO DATE T
SINCE JUN 1 T
SINCE JUL 1 T
SNOW DEPTH MM
DEGREE DAYS
HEATING
TODAY 0 1 -1 2
MONTH TO DATE 17 28 -11 67
SINCE JUN 1 229 183 46 230
SINCE JUL 1 86 86 0 117
COOLING
TODAY 1 1 0 0
MONTH TO DATE 11 18 -7 1
SINCE JUN 1 13 67 -54 50
SINCE JAN 1 19 87 -68 61
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION W (290)
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 12.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 12:00 AM
LOWEST 42 1:00 PM
AVERAGE 68
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 89 1964
MINIMUM TEMPERATURE (F) 57 49 1955
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.
$$