144 CDUS46 KMTR 200845 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 145 AM PDT SAT SEP 20 2025 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 19 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 2:07 PM 93 2000 75 -3 66 MINIMUM 60 6:16 AM 46 1947 56 4 54 1954 AVERAGE 66 65 1 60 PRECIPITATION (IN) YESTERDAY 0.00 0.46 1977 0.00 0.00 0.00 MONTH TO DATE 0.04 0.02 0.02 0.00 SINCE OCT 1 16.15 19.59 -3.44 20.23 SINCE JAN 1 7.59 12.62 -5.03 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 5 MONTH TO DATE 2 22 -20 54 SINCE SEP 1 2 22 -20 54 SINCE JUL 1 92 124 -32 184 COOLING YESTERDAY 1 2 -1 0 MONTH TO DATE 41 38 3 3 SINCE SEP 1 41 38 3 3 SINCE JAN 1 91 148 -57 77 ................................................................... WIND (MPH) RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION NW (300) HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (300) HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (300) AVERAGE WIND SPEED 10.2 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.5 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 93 12:00 AM LOWEST 66 12:00 PM AVERAGE 80 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 75 93 1983 1990 2015 MINIMUM TEMPERATURE (F) 56 48 1947 1954 1965 SUNRISE AND SUNSET SEPTEMBER 20 2025.....SUNRISE 6:56 AM PDT SUNSET 7:09 PM PDT SEPTEMBER 21 2025.....SUNRISE 6:57 AM PDT SUNSET 7:07 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$