617
CDUS41 KLWX 120523
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
123 AM EDT TUE SEP 12 2023
...............................
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 11 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 88 3:33 PM 99 1983 81 7 81
MINIMUM 69 11:13 PM 40 1976 60 9 69
AVERAGE 79 70 9 75
PRECIPITATION (IN)
YESTERDAY 1.45R 0.72 1987 0.13 1.32 0.57
MONTH TO DATE 2.69 1.35 1.34 2.50
SINCE SEP 1 2.69 1.35 1.34 2.50
SINCE JAN 1 21.91 30.57 -8.66 30.00
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 0 1 -1 0
MONTH TO DATE 0 2 -2 0
SINCE SEP 1 0 2 -2 0
SINCE JUL 1 0 3 -3 0
COOLING
YESTERDAY 14 6 8 10
MONTH TO DATE 165 80 85 111
SINCE SEP 1 165 80 85 111
SINCE JAN 1 1280 1136 144 1289
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WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NW (310)
AVERAGE WIND SPEED 5.9
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1:00 AM
LOWEST 43 5:00 PM
AVERAGE 68
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THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 95 1998
2019
MINIMUM TEMPERATURE (F) 60 40 1967
SUNRISE AND SUNSET
SEPTEMBER 12 2023.....SUNRISE 6:48 AM EDT SUNSET 7:23 PM EDT
SEPTEMBER 13 2023.....SUNRISE 6:49 AM EDT SUNSET 7:22 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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