102 CDUS46 KMTR 170834 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1234 AM PST WED DEC 17 2025 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 16 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 57 4:16 PM 70 1998 58 -1 58 MINIMUM 48 6:23 AM 33 1965 44 4 45 AVERAGE 53 51 2 52 PRECIPITATION (IN) YESTERDAY 0.00 2.10 2002 0.14 -0.14 0.28 MONTH TO DATE 0.00 2.07 -2.07 2.99 SINCE OCT 1 4.46 4.90 -0.44 7.04 SINCE JAN 1 12.08 17.57 -5.49 21.94 SNOWFALL (IN) YESTERDAY MM 0.0 MONTH TO DATE T SINCE DEC 1 T SINCE JUL 1 T DEGREE DAYS HEATING YESTERDAY 12 14 -2 13 MONTH TO DATE 238 209 29 161 SINCE DEC 1 238 209 29 161 SINCE JUL 1 589 717 -128 702 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 ................................................................... WIND (MPH) RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION NE (40) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (10) HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (10) AVERAGE WIND SPEED 3.8 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 93 2:00 AM LOWEST 69 4:00 PM AVERAGE 81 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 58 67 1958 MINIMUM TEMPERATURE (F) 44 30 1965 SUNRISE AND SUNSET DECEMBER 17 2025......SUNRISE 7:19 AM PST SUNSET 4:53 PM PST DECEMBER 18 2025......SUNRISE 7:19 AM PST SUNSET 4:53 PM PST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$