735
CDUS41 KLWX 200521
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1221 AM EST WED DEC 20 2023
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 19 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 41 2:59 PM 63 1967 46 -5 43
MINIMUM 29 11:37 PM -2 1989 28 1 25
AVERAGE 35 37 -2 34
PRECIPITATION (IN)
YESTERDAY 0.00 1.34 2009 0.10 -0.10 0.00
MONTH TO DATE 4.73 2.12 2.61 2.34
SINCE DEC 1 4.73 2.12 2.61 2.34
SINCE JAN 1 33.76 42.06 -8.30 38.15
SNOWFALL (IN)
YESTERDAY 0.0 16.0 2009 0.1 -0.1 0.0
MONTH TO DATE 0.5 1.6 -1.1 0.0
SINCE DEC 1 0.5 1.6 -1.1 0.0
SINCE JUL 1 0.5 1.9 -1.4 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 30 28 2 31
MONTH TO DATE 420 495 -75 485
SINCE DEC 1 420 495 -75 485
SINCE JUL 1 1191 1395 -204 1319
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1380 1231 149 1376
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WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 14.8
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 58 8:00 PM
LOWEST 41 3:00 PM
AVERAGE 50
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 45 64 1988
MINIMUM TEMPERATURE (F) 28 8 1991
SUNRISE AND SUNSET
DECEMBER 20 2023......SUNRISE 7:24 AM EST SUNSET 4:50 PM EST
DECEMBER 21 2023......SUNRISE 7:25 AM EST SUNSET 4:51 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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