Climatological Report (Daily)
Issued by NWS
Issued by NWS
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782
CDUS46 KMTR 220028
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
528 PM PDT THU AUG 21 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR AUGUST 21 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 81 11:49 AM 85 1974 74 7 71
MINIMUM 58 5:57 AM 48 1952 57 1 56
AVERAGE 70 65 5 64
PRECIPITATION (IN)
TODAY 0.00 0.04 1968 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 1
MONTH TO DATE 17 31 -14 72
SINCE JUN 1 229 186 43 235
SINCE JUL 1 86 89 -3 122
COOLING
TODAY 5 2 3 0
MONTH TO DATE 22 22 0 1
SINCE JUN 1 24 71 -47 50
SINCE JAN 1 30 91 -61 61
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION NW (300)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 10.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 1:00 AM
LOWEST 45 12:00 PM
AVERAGE 66
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 90 1999
MINIMUM TEMPERATURE (F) 57 49 1955
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:31 AM PDT SUNSET 7:54 PM PDT
AUGUST 22 2025........SUNRISE 6:32 AM PDT SUNSET 7:52 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$