CDUS41 KLWX 110624 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 224 AM EDT FRI SEP 11 2026 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 10 2026... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2026 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 88 4:10 PM 99 1983 82 6 72 MINIMUM 71 6:06 AM 43 1981 60 11 59 AVERAGE 80 71 9 66 PRECIPITATION (IN) YESTERDAY 0.00 1.50 1968 0.12 -0.12 0.15 MONTH TO DATE 0.83 1.22 -0.39 0.18 SINCE SEP 1 0.83 1.22 -0.39 0.18 SINCE JAN 1 30.23 30.44 -0.21 24.82 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 SEP 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 1 -1 0 MONTH TO DATE 0 1 -1 6 SINCE SEP 1 0 1 -1 6 SINCE JUL 1 0 2 -2 8 COOLING YESTERDAY 15 6 9 1 MONTH TO DATE 126 74 52 39 SINCE SEP 1 126 74 52 39 SINCE JAN 1 1406 1130 276 1187 ................................................................... WIND (MPH) HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (290) HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200) AVERAGE WIND SPEED 7.9 SKY COVER AVERAGE SKY COVER 0.6 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 76 5:00 AM LOWEST 54 2:00 PM AVERAGE 65 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 81 99 1983 MINIMUM TEMPERATURE (F) 60 40 1976 SUNRISE AND SUNSET SEPTEMBER 11 2026.....SUNRISE 6:48 AM EDT SUNSET 7:24 PM EDT SEPTEMBER 12 2026.....SUNRISE 6:49 AM EDT SUNSET 7:23 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$