National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2017-12-18 05:23 UTC
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870
CDUS41 KLWX 180524
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1223 AM EST MON DEC 18 2017
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 17 2017...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2017
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
..................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 51 229 PM 70 1984 45 6 52
MINIMUM 23 530 AM 3 1989 27 -4 25
AVERAGE 37 36 1 39
PRECIPITATION (IN)
YESTERDAY T 0.75 2000 0.09 -0.09 0.16
MONTH TO DATE 0.36 1.77 -1.41 1.64
SINCE DEC 1 0.36 1.77 -1.41 1.64
SINCE JAN 1 40.25 40.35 -0.10 34.61
SNOWFALL (IN)
YESTERDAY 0.0 4.3 1973 0.1 -0.1
MONTH TO DATE 4.2 1.7 2.5
SINCE JUL 1 4.2 2.2 2.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 28 29 -1 26
MONTH TO DATE 475 455 20 465
SINCE DEC 1 475 455 20 465
SINCE JUL 1 1269 1371 -102 1192
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1281 1178 103 1559
..................................................................
WIND (MPH)
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION SE (130)
AVERAGE WIND SPEED 1.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 600 AM
LOWEST 39 300 PM
AVERAGE 66
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 45 76 2006
MINIMUM TEMPERATURE (F) 26 3 1989
SUNRISE AND SUNSET
DECEMBER 18 2017......SUNRISE 723 AM EST SUNSET 450 PM EST
DECEMBER 19 2017......SUNRISE 724 AM EST SUNSET 450 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$