740 CDUS41 KLWX 160522 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 122 AM EDT WED SEP 16 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 15 2020... CLIMATE NORMAL PERIOD: 1981 TO 2010 CLIMATE RECORD PERIOD: 1960 TO 2020 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 69 4:02 PM 95 1993 80 -11 87 1998 MINIMUM 49 11:59 PM 38 1985 57 -8 60 AVERAGE 59 68 -9 74 PRECIPITATION (IN) YESTERDAY 0.00 1.06 1981 0.15 -0.15 0.00 MONTH TO DATE 1.16 1.88 -0.72 0.33 SINCE SEP 1 1.16 1.88 -0.72 0.33 SINCE JAN 1 35.38 29.88 5.50 30.17 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 6 1 5 0 MONTH TO DATE 6 8 -2 0 SINCE SEP 1 6 8 -2 0 SINCE JUL 1 6 10 -4 0 COOLING YESTERDAY 0 5 -5 9 MONTH TO DATE 116 97 19 144 SINCE SEP 1 116 97 19 144 SINCE JAN 1 1368 1113 255 1379 ................................................................... WIND (MPH) HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NE (30) HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (360) AVERAGE WIND SPEED 4.5 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 93 10:00 PM LOWEST 42 2:00 PM AVERAGE 68 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 79 97 1991 MINIMUM TEMPERATURE (F) 56 37 1984 SUNRISE AND SUNSET SEPTEMBER 16 2020.....SUNRISE 6:53 AM EDT SUNSET 7:16 PM EDT SEPTEMBER 17 2020.....SUNRISE 6:53 AM EDT SUNSET 7:14 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$