National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2017-09-18 05:33 UTC
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777
CDUS41 KLWX 180534
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
133 AM EDT MON SEP 18 2017
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 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 83 334 PM 97 1991 79 4 82
MINIMUM 62 607 AM 35 1986 56 6 67
AVERAGE 73 68 5 75
PRECIPITATION (IN)
YESTERDAY 0.00 1.71 2004 0.14 -0.14 0.00
MONTH TO DATE 1.75 2.17 -0.42 0.17
SINCE SEP 1 1.75 2.17 -0.42 0.17
SINCE JAN 1 34.75 30.17 4.58 28.17
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0
SINCE JUL 1 T 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 30 12 18 0
SINCE SEP 1 30 12 18 0
SINCE JUL 1 31 14 17 0
COOLING
YESTERDAY 8 4 4 10
MONTH TO DATE 56 105 -49 190
SINCE SEP 1 56 105 -49 190
SINCE JAN 1 1117 1121 -4 1453
..................................................................
WIND (MPH)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (130)
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION SE (130)
AVERAGE WIND SPEED 3.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 100 AM
LOWEST 55 400 PM
AVERAGE 78
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 91 1978
MINIMUM TEMPERATURE (F) 56 37 1990
SUNRISE AND SUNSET
SEPTEMBER 18 2017.....SUNRISE 654 AM EDT SUNSET 713 PM EDT
SEPTEMBER 19 2017.....SUNRISE 655 AM EDT SUNSET 711 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$