853 CDUS46 KMTR 180828 CLIAPC CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1228 AM PST TUE DEC 18 2018 ................................... ...THE NAPA AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 2018... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1998 TO 2018 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL .................................................................. TEMPERATURE (F) YESTERDAY MAXIMUM 58 355 PM 66 2017 55 3 66 2000 MINIMUM 41 1159 PM 24 2008 36 5 37 AVERAGE 50 45 5 52 PRECIPITATION (IN) YESTERDAY 0.01 0.00 MONTH TO DATE 1.36 0.01 SINCE OCT 1 2.62 2.98 SINCE JAN 1 15.39 31.16 DEGREE DAYS HEATING YESTERDAY 15 13 MONTH TO DATE 256 278 SINCE DEC 1 256 278 SINCE JUL 1 823 806 COOLING YESTERDAY 0 0 MONTH TO DATE 0 0 SINCE DEC 1 0 0 SINCE JAN 1 182 530 .................................................................. WIND (MPH) RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION W (250) HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION SW (240) AVERAGE WIND SPEED 2.3 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT RAIN FOG FOG W/VISIBILITY <= 1/4 MILE RELATIVE HUMIDITY (PERCENT) HIGHEST 100 800 AM LOWEST 77 100 PM AVERAGE 89 .......................................................... THE NAPA AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 55 63 2017 MINIMUM TEMPERATURE (F) 36 21 2006 SUNRISE AND SUNSET DECEMBER 18 2018......SUNRISE 720 AM PST SUNSET 451 PM PST DECEMBER 19 2018......SUNRISE 721 AM PST SUNSET 452 PM PST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$