415 CDUS41 KLWX 110532 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 132 AM EDT MON SEP 11 2017 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 10 2017... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1960 TO 2017 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL .................................................................. TEMPERATURE (F) YESTERDAY MAXIMUM 72 259 PM 99 1983 82 -10 96 MINIMUM 47 512 AM 43 1981 59 -12 72 AVERAGE 60 70 -10 84 PRECIPITATION (IN) YESTERDAY 0.00 1.50 1968 0.12 -0.12 0.00 MONTH TO DATE 1.63 1.19 0.44 0.17 SINCE SEP 1 1.63 1.19 0.44 0.17 SINCE JAN 1 34.63 29.19 5.44 28.17 SNOWFALL (IN) YESTERDAY 0.0 MM MM 0.0 0.0 MONTH TO DATE 0.0 0.0 0.0 SINCE JUL 1 T 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 5 1 4 0 MONTH TO DATE 26 3 23 0 SINCE SEP 1 26 3 23 0 SINCE JUL 1 27 5 22 0 COOLING YESTERDAY 0 6 -6 19 MONTH TO DATE 19 71 -52 124 SINCE SEP 1 19 71 -52 124 SINCE JAN 1 1080 1087 -7 1387 .................................................................. WIND (MPH) HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (50) HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (20) 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 93 100 AM LOWEST 47 300 PM AVERAGE 70 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 81 99 1983 MINIMUM TEMPERATURE (F) 58 40 1976 SUNRISE AND SUNSET SEPTEMBER 11 2017.....SUNRISE 648 AM EDT SUNSET 724 PM EDT SEPTEMBER 12 2017.....SUNRISE 649 AM EDT SUNSET 722 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$