418 CDUS46 KMTR 200845 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1245 AM PST TUE DEC 20 2016 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 19 2016... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1927 TO 2016 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL .................................................................. TEMPERATURE (F) YESTERDAY MAXIMUM 55 243 PM 68 1999 56 -1 55 MINIMUM 36 440 AM 32 1965 44 -8 49 AVERAGE 46 50 -4 52 PRECIPITATION (IN) YESTERDAY 0.00 1.81 1952 0.14 -0.14 0.04 MONTH TO DATE 3.98 2.29 1.69 1.82 SINCE OCT 1 8.30 5.62 2.68 3.24 SINCE JAN 1 20.74 18.91 1.83 6.89 SNOWFALL (IN) YESTERDAY 0.0 0.0 MONTH TO DATE 0.0 SINCE DEC 1 0.0 SINCE JUL 1 0.0 DEGREE DAYS HEATING YESTERDAY 19 15 4 13 MONTH TO DATE 245 265 -20 235 SINCE DEC 1 245 265 -20 235 SINCE JUL 1 659 829 -170 592 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 142 164 -22 327 .................................................................. WIND (MPH) RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION NE (60) HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (30) HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (340) AVERAGE WIND SPEED 5.5 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 85 500 AM LOWEST 41 200 PM AVERAGE 63 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 56 69 1999 1887 MINIMUM TEMPERATURE (F) 44 31 1965 SUNRISE AND SUNSET DECEMBER 20 2016......SUNRISE 721 AM PST SUNSET 454 PM PST DECEMBER 21 2016......SUNRISE 721 AM PST SUNSET 455 PM PST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$