Climatological Report (Daily)
Issued by NWS
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182
CDUS46 KMTR 210830
CLISFO
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
130 AM PDT SUN SEP 21 2025
...................................
...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 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 72 1:17 PM 93 1983 75 -3 67
1990
2015
MINIMUM 62 3:03 AM 48 1947 56 6 55
1954
1965
AVERAGE 67 65 2 61
PRECIPITATION (IN)
YESTERDAY 0.00 0.08 2005 0.01 -0.01 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 4
MONTH TO DATE 2 24 -22 58
SINCE SEP 1 2 24 -22 58
SINCE JUL 1 92 126 -34 188
COOLING
YESTERDAY 2 2 0 0
MONTH TO DATE 43 40 3 3
SINCE SEP 1 43 40 3 3
SINCE JAN 1 93 150 -57 77
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION W (290)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 12.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 2:00 AM
LOWEST 63 12:00 PM
AVERAGE 75
..........................................................
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 95 2003
MINIMUM TEMPERATURE (F) 56 45 1955
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 6:57 AM PDT SUNSET 7:07 PM PDT
SEPTEMBER 22 2025.....SUNRISE 6:58 AM PDT SUNSET 7:06 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$