951 CDUS46 KMTR 180845 CLISFO CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1245 AM PST SUN DEC 18 2016 ................................... ...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 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 52 304 PM 67 1958 56 -4 55 MINIMUM 38 739 AM 30 1965 44 -6 50 AVERAGE 45 50 -5 53 PRECIPITATION (IN) YESTERDAY 0.00 1.26 2005 0.13 -0.13 0.00 MONTH TO DATE 3.98 2.01 1.97 1.56 SINCE OCT 1 8.30 5.34 2.96 2.98 SINCE JAN 1 20.74 18.63 2.11 6.63 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 20 15 5 12 MONTH TO DATE 206 235 -29 209 SINCE DEC 1 206 235 -29 209 SINCE JUL 1 620 799 -179 566 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 3 RESULTANT WIND DIRECTION NW (310) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (20) HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION N (20) AVERAGE WIND SPEED 5.4 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 70 500 AM LOWEST 39 100 PM AVERAGE 55 .......................................................... THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 56 65 1958 MINIMUM TEMPERATURE (F) 44 30 1965 SUNRISE AND SUNSET DECEMBER 18 2016......SUNRISE 719 AM PST SUNSET 453 PM PST DECEMBER 19 2016......SUNRISE 720 AM PST SUNSET 454 PM PST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$