806 CDUS41 KLWX 290521 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1221 AM EST TUE DEC 29 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 28 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 56 3:37 PM 73 1984 43 13 65 MINIMUM 32 2:37 AM 8 1966 25 7 32 AVERAGE 44 34 10 49 PRECIPITATION (IN) YESTERDAY 0.00 1.74 1967 0.08 -0.08 0.00 MONTH TO DATE 5.81 2.73 3.08 2.34 SINCE DEC 1 5.81 2.73 3.08 2.34 SINCE JAN 1 49.46 41.31 8.15 40.18 SNOWFALL (IN) YESTERDAY 0.0 2.3 1993 0.2 -0.2 0.0 MONTH TO DATE 2.4 3.1 -0.7 0.6 SINCE DEC 1 2.4 3.1 -0.7 0.6 SINCE JUL 1 2.4 3.6 -1.2 0.6 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 21 31 -10 16 MONTH TO DATE 722 789 -67 752 SINCE DEC 1 722 789 -67 752 SINCE JUL 1 1389 1705 -316 1615 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 1406 1178 228 1524 ................................................................... WIND (MPH) HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200) HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION S (190) AVERAGE WIND SPEED 9.6 SKY COVER AVERAGE SKY COVER 0.6 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 79 12:00 AM LOWEST 41 2:00 PM AVERAGE 60 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 43 78 1984 MINIMUM TEMPERATURE (F) 25 7 1977 SUNRISE AND SUNSET DECEMBER 29 2020......SUNRISE 7:28 AM EST SUNSET 4:56 PM EST DECEMBER 30 2020......SUNRISE 7:28 AM EST SUNSET 4:57 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$