CDUS41 KLWX 180647 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 247 AM EDT MON MAY 18 2026 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 17 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 5:15 PM 93 1960 75 13 86 MINIMUM 57 5:15 AM 30 1984 53 4 65 AVERAGE 73 64 9 76 PRECIPITATION (IN) YESTERDAY 0.01 1.22 1970 0.16 -0.15 0.01 MONTH TO DATE 0.87 2.53 -1.66 3.34 SINCE MAR 1 5.39 9.50 -4.11 6.77 SINCE JAN 1 11.19 15.05 -3.86 11.19 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 MAR 1 1.0 4.0 -3.0 0.0 SINCE JUL 1 13.6 21.0 -7.4 15.5 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 0 4 -4 0 MONTH TO DATE 93 81 12 20 SINCE MAR 1 743 1048 -305 711 SINCE JUL 1 4372 4558 -186 4033 COOLING YESTERDAY 8 3 5 11 MONTH TO DATE 16 32 -16 63 SINCE MAR 1 102 54 48 110 SINCE JAN 1 102 54 48 110 ................................................................... WIND (MPH) HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (310) HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (290) AVERAGE WIND SPEED 4.6 SKY COVER AVERAGE SKY COVER 0.5 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. LIGHT RAIN RELATIVE HUMIDITY (PERCENT) HIGHEST 93 2:00 AM LOWEST 40 3:00 PM AVERAGE 67 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 75 91 1987 MINIMUM TEMPERATURE (F) 54 33 1973 SUNRISE AND SUNSETMAY 18 2026...........SUNRISE 5:55 AM EDT SUNSET 8:18 PM EDT MAY 19 2026...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$