197
CDUS41 KLWX 280521
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1220 AM EST SAT NOV 28 2009
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 27 2009
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1962 TO 2009
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
..............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 50 1140 AM 68 1976 52 -2 49
MINIMUM 40 1126 PM 11 1974 31 9 22
AVERAGE 45 42 3 36
PRECIPITATION (IN)
YESTERDAY T 2.59 1993 0.11 -0.11 0.00
MONTH TO DATE 3.45 2.98 0.47 1.45
SINCE SEP 1 10.98 10.17 0.81 9.94
SINCE JAN 1 42.38 38.40 3.98 40.82
SNOWFALL (IN)
YESTERDAY 0.0 0.1 -0.1
MONTH TO DATE 0.0 0.5 -0.5
SINCE JUL 1 0.0 0.6 -0.6
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 20 23 -3 29
MONTH TO DATE 393 518 -125 536
SINCE SEP 1 680 901 -221 874
SINCE JUL 1 680 906 -226 874
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 137 147 -10 177
SINCE JAN 1 1259 1072 187 1171
..............................................................
WIND (MPH)
HIGHEST WIND SPEED 33 HIGHEST WIND DIRECTION NW (300)
HIGHEST GUST SPEED 43 HIGHEST GUST DIRECTION NW (300)
AVERAGE WIND SPEED 16.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 76 1200 AM
LOWEST 45 400 PM
AVERAGE 61
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 52 71 1998
1990
MINIMUM TEMPERATURE (F) 31 19 1996
SUNRISE AND SUNSET
NOVEMBER 28 2009......SUNRISE 707 AM EST SUNSET 449 PM EST
NOVEMBER 29 2009......SUNRISE 708 AM EST SUNSET 448 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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