478 CDUS41 KLWX 100527 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 127 AM EDT THU AUG 10 2023 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 9 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2023 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 89 3:00 PM 97 1980 87 2 96 2001 MINIMUM 64 4:04 AM 47 1989 66 -2 74 AVERAGE 77 77 0 85 PRECIPITATION (IN) YESTERDAY 0.00 2.28 1969 0.12 -0.12 0.06 MONTH TO DATE 1.19 1.08 0.11 0.84 SINCE JUN 1 8.58 9.53 -0.95 8.82 SINCE JAN 1 18.56 26.77 -8.21 26.04 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 5 13 -8 0 SINCE JUL 1 0 0 0 0 COOLING YESTERDAY 12 12 0 20 MONTH TO DATE 99 108 -9 153 SINCE JUN 1 754 724 30 806 SINCE JAN 1 828 830 -2 935 ................................................................... WIND (MPH) HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION W (280) AVERAGE WIND SPEED 5.8 SKY COVER AVERAGE SKY COVER 0.4 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 82 10:00 PM LOWEST 40 2:00 PM AVERAGE 61 .......................................................... 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 2023........SUNRISE 6:19 AM EDT SUNSET 8:11 PM EDT AUGUST 11 2023........SUNRISE 6:19 AM EDT SUNSET 8:10 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$