503
CDUS41 KLWX 180522
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
120 AM EDT SUN OCT 18 2009
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 17 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 45 205 PM 83 1963 67 -22 62
MINIMUM 40 1137 PM 31 1982 42 -2 50
1981
AVERAGE 43 54 -11 56
PRECIPITATION (IN)
YESTERDAY 1.01 1.11 1975 0.11 0.90 0.00
MONTH TO DATE 2.24 1.89 0.35 0.19
SINCE SEP 1 4.07 5.71 -1.64 7.37
SINCE JAN 1 35.47 33.94 1.53 38.25
SNOWFALL (IN)
YESTERDAY 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 22 11 11 9
MONTH TO DATE 156 141 15 71
SINCE SEP 1 175 201 -26 95
SINCE JUL 1 175 206 -31 95
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 8 15 -7 17
SINCE SEP 1 137 147 -10 177
SINCE JAN 1 1259 1072 187 1171
..............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 12.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 1100 PM
LOWEST 83 1000 AM
AVERAGE 88
......................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 67 82 2007
1963
MINIMUM TEMPERATURE (F) 41 27 1982
1976
SUNRISE AND SUNSET
OCTOBER 18 2009.......SUNRISE 722 AM EDT SUNSET 627 PM EDT
OCTOBER 19 2009.......SUNRISE 723 AM EDT SUNSET 625 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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