708
CDUS41 KLWX 180527
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
127 AM EDT MON SEP 18 2023
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 17 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 74 12:59 PM 97 1991 79 -5 81
MINIMUM 54 3:18 AM 35 1986 58 -4 55
AVERAGE 64 68 -4 68
PRECIPITATION (IN)
YESTERDAY 0.11 1.71 2004 0.14 -0.03 0.00
MONTH TO DATE 3.61 2.18 1.43 2.78
SINCE SEP 1 3.61 2.18 1.43 2.78
SINCE JAN 1 22.83 31.40 -8.57 30.28
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE T 0.0 0.0 0.0
SINCE SEP 1 T 0.0 0.0 0.0
SINCE JUL 1 T 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 1 1 0 0
MONTH TO DATE 1 8 -7 0
SINCE SEP 1 1 8 -7 0
SINCE JUL 1 1 9 -8 0
COOLING
YESTERDAY 0 5 -5 3
MONTH TO DATE 199 112 87 144
SINCE SEP 1 199 112 87 144
SINCE JAN 1 1314 1168 146 1322
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WIND (MPH)
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 4.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 9:00 PM
LOWEST 30 2:00 AM
AVERAGE 59
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 91 1978
MINIMUM TEMPERATURE (F) 57 37 1990
SUNRISE AND SUNSET
SEPTEMBER 18 2023.....SUNRISE 6:54 AM EDT SUNSET 7:14 PM EDT
SEPTEMBER 19 2023.....SUNRISE 6:55 AM EDT SUNSET 7:12 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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