549 CDUS46 KMTR 220840 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 140 AM PDT THU MAY 22 2025 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR MAY 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 72 11:30 AM 92 2000 69 3 77 MINIMUM 49 4:38 AM 45 1962 52 -3 52 1974 AVERAGE 61 60 1 65 PRECIPITATION (IN) YESTERDAY 0.00 0.24 2006 0.01 -0.01 0.00 MONTH TO DATE 0.11 0.36 -0.25 0.95 SINCE OCT 1 16.11 19.27 -3.16 20.13 SINCE JAN 1 7.55 12.30 -4.75 14.80 SNOWFALL (IN) YESTERDAY MM 0.0 MONTH TO DATE T SINCE MAR 1 T SINCE JUL 1 T DEGREE DAYS HEATING YESTERDAY 4 5 -1 0 MONTH TO DATE 113 124 -11 92 SINCE MAR 1 667 654 13 581 SINCE JUL 1 2200 2333 -133 1722 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 2 0 2 10 SINCE MAR 1 5 6 -1 11 SINCE JAN 1 5 6 -1 11 ................................................................... WIND (MPH) RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION W (290) HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (290) AVERAGE WIND SPEED 13.2 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 86 4:00 AM LOWEST 47 4:00 PM AVERAGE 67 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 69 83 1954 MINIMUM TEMPERATURE (F) 52 44 1952 SUNRISE AND SUNSET MAY 22 2025...........SUNRISE 5:55 AM PDT SUNSET 8:18 PM PDT MAY 23 2025...........SUNRISE 5:54 AM PDT SUNSET 8:19 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$