849 CDUS41 KLWX 100523 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 123 AM EDT SUN SEP 10 2023 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 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 90 12:50 PM 98 2016 82 8 83 MINIMUM 68 8:33 PM 40 1986 61 7 58 AVERAGE 79 71 8 71 PRECIPITATION (IN) YESTERDAY 0.81 1.40 2018 0.13 0.68 0.00 MONTH TO DATE 1.24 1.10 0.14 1.91 SINCE SEP 1 1.24 1.10 0.14 1.91 SINCE JAN 1 20.46 30.32 -9.86 29.41 SNOWFALL (IN) YESTERDAY 0.0 MM MM 0.0 0.0 0.0 MONTH TO DATE T 0.0 0.0 0.0 SINCE SEP 1 T 0.0 0.0 0.0 SINCE JUL 1 T 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 SEP 1 0 0 0 0 SINCE JUL 1 0 1 -1 0 COOLING YESTERDAY 14 7 7 6 MONTH TO DATE 140 68 72 96 SINCE SEP 1 140 68 72 96 SINCE JAN 1 1255 1124 131 1274 ................................................................... WIND (MPH) HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION E (110) HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION SE (120) AVERAGE WIND SPEED 3.6 SKY COVER AVERAGE SKY COVER 0.8 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. THUNDERSTORM HEAVY RAIN RAIN LIGHT RAIN FOG HAZE RELATIVE HUMIDITY (PERCENT) HIGHEST 93 4:00 PM LOWEST 50 1:00 PM AVERAGE 72 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 82 99 1983 MINIMUM TEMPERATURE (F) 60 43 1981 SUNRISE AND SUNSET SEPTEMBER 10 2023.....SUNRISE 6:47 AM EDT SUNSET 7:26 PM EDT SEPTEMBER 11 2023.....SUNRISE 6:47 AM EDT SUNSET 7:25 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$