686 CDUS41 KLWX 300522 CLIIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1222 AM EST WED DEC 30 2020 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 29 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 42 12:04 AM 78 1984 43 -1 52 MINIMUM 24 10:01 PM 7 1977 25 -1 40 AVERAGE 33 34 -1 46 PRECIPITATION (IN) YESTERDAY 0.00 1.27 2013 0.08 -0.08 0.45 MONTH TO DATE 5.81 2.81 3.00 2.79 SINCE DEC 1 5.81 2.81 3.00 2.79 SINCE JAN 1 49.46 41.39 8.07 40.63 SNOWFALL (IN) YESTERDAY 0.0 3.3 1962 0.1 -0.1 0.0 MONTH TO DATE 2.4 3.2 -0.8 0.6 SINCE DEC 1 2.4 3.2 -0.8 0.6 SINCE JUL 1 2.4 3.7 -1.3 0.6 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 32 31 1 19 MONTH TO DATE 754 820 -66 771 SINCE DEC 1 754 820 -66 771 SINCE JUL 1 1421 1736 -315 1634 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 22 HIGHEST WIND DIRECTION NW (310) HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (320) AVERAGE WIND SPEED 10.3 SKY COVER AVERAGE SKY COVER 0.3 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 74 10:00 PM LOWEST 31 2:00 PM AVERAGE 53 .......................................................... THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 43 67 1990 MINIMUM TEMPERATURE (F) 25 4 1963 SUNRISE AND SUNSET DECEMBER 30 2020......SUNRISE 7:28 AM EST SUNSET 4:57 PM EST DECEMBER 31 2020......SUNRISE 7:28 AM EST SUNSET 4:58 PM EST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$