144
CDUS46 KMTR 210828
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1228 AM PST SUN DEC 21 2025
...............................
..THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 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 62 11:59 PM 69 1999 58 4 56
MINIMUM 56 6:25 PM 31 1965 44 12 45
AVERAGE 59 51 8 51
PRECIPITATION (IN)
YESTERDAY 0.03 1.30 2023 0.14 -0.11 0.00
MONTH TO DATE 0.24 2.62 -2.38 2.99
SINCE OCT 1 4.70 5.45 -0.75 7.04
SINCE JAN 1 12.32 18.12 -5.80 21.94
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE DEC 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 6 14 -8 14
MONTH TO DATE 271 265 6 213
SINCE DEC 1 271 265 6 213
SINCE JUL 1 622 773 -151 754
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 150 201 -51 184
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WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION S (160)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 4.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 7:00 AM
LOWEST 87 1:00 AM
AVERAGE 94
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THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 58 68 1999
MINIMUM TEMPERATURE (F) 44 28 1990
SUNRISE AND SUNSET
DECEMBER 21 2025......SUNRISE 7:21 AM PST SUNSET 4:55 PM PST
DECEMBER 22 2025......SUNRISE 7:21 AM PST SUNSET 4:55 PM PST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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