463 CDUS41 KLWX 100521 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 121 AM EDT TUE AUG 10 2021 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 9 2021... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2021 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 94 2:33 PM 97 1980 87 7 91 2001 MINIMUM 68 5:05 AM 47 1989 66 2 69 AVERAGE 81 77 4 80 PRECIPITATION (IN) YESTERDAY 0.00 2.28 1969 0.12 -0.12 0.00 MONTH TO DATE 0.65 1.08 -0.43 2.97 SINCE JUN 1 6.73 9.53 -2.80 13.03 SINCE JAN 1 20.31 26.77 -6.46 29.55 SNOWFALL (IN) YESTERDAY 0.0 MM MM 0.0 0.0 0.0 MONTH TO DATE 0.0 0.0 0.0 0.0 SINCE JUN 1 0.0 0.0 0.0 0.0 SINCE JUL 1 0.0 0.0 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE JUN 1 6 13 -7 5 SINCE JUL 1 0 0 0 0 COOLING YESTERDAY 16 12 4 15 MONTH TO DATE 79 108 -29 128 SINCE JUN 1 793 724 69 902 SINCE JAN 1 902 830 72 979 ................................................................... WIND (MPH) HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (200) HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200) AVERAGE WIND SPEED 5.2 SKY COVER AVERAGE SKY COVER 0.5 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. THUNDERSTORM FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 100 3:00 AM LOWEST 43 5:00 PM AVERAGE 72 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 87 97 2009 MINIMUM TEMPERATURE (F) 66 51 1999 SUNRISE AND SUNSET AUGUST 10 2021........SUNRISE 6:19 AM EDT SUNSET 8:11 PM EDT AUGUST 11 2021........SUNRISE 6:20 AM EDT SUNSET 8:09 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$