Climatological Report (Daily)
Issued by NWS
Issued by NWS
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177
CDUS46 KMTR 220841
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
141 AM PDT MON SEP 22 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 21 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 73 2:47 PM 95 2003 75 -2 70
MINIMUM 59 6:18 AM 45 1955 56 3 54
AVERAGE 66 65 1 62
PRECIPITATION (IN)
YESTERDAY 0.00 0.23 2013 0.00 0.00 0.00
MONTH TO DATE 0.04 0.03 0.01 0.00
SINCE OCT 1 16.15 19.60 -3.45 20.23
SINCE JAN 1 7.59 12.63 -5.04 14.90
SNOWFALL (IN)
YESTERDAY MM 0.0
MONTH TO DATE T
SINCE SEP 1 T
SINCE JUL 1 T
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 3
MONTH TO DATE 2 26 -24 61
SINCE SEP 1 2 26 -24 61
SINCE JUL 1 92 128 -36 191
COOLING
YESTERDAY 1 2 -1 0
MONTH TO DATE 44 42 2 3
SINCE SEP 1 44 42 2 3
SINCE JAN 1 94 152 -58 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION NW (300)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 12.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 7:00 AM
LOWEST 61 3:00 PM
AVERAGE 77
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 91 1946
MINIMUM TEMPERATURE (F) 56 48 1981
SUNRISE AND SUNSET
SEPTEMBER 22 2025.....SUNRISE 6:58 AM PDT SUNSET 7:06 PM PDT
SEPTEMBER 23 2025.....SUNRISE 6:59 AM PDT SUNSET 7:04 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$