National Weather Service Text Product
AFOS product CLIIAD
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIIAD
Product Timestamp: 2020-09-19 05:24 UTC
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741
CDUS41 KLWX 190524
CLIIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
124 AM EDT SAT SEP 19 2020
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 18 2020...
CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1960 TO 2020
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 75 2:38 PM 91 1978 79 -4 79
MINIMUM 57 11:59 PM 37 1990 56 1 54
AVERAGE 66 67 -1 67
PRECIPITATION (IN)
YESTERDAY 0.14 1.76 2003 0.15 -0.01 0.00
MONTH TO DATE 1.48 2.32 -0.84 0.33
SINCE SEP 1 1.48 2.32 -0.84 0.33
SINCE JAN 1 35.70 30.32 5.38 30.17
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 13 14 -1 0
SINCE SEP 1 13 14 -1 0
SINCE JUL 1 13 16 -3 0
COOLING
YESTERDAY 1 4 -3 2
MONTH TO DATE 117 109 8 162
SINCE SEP 1 117 109 8 162
SINCE JAN 1 1369 1125 244 1397
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (340)
AVERAGE WIND SPEED 10.2
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 12:00 AM
LOWEST 46 6:00 PM
AVERAGE 72
..........................................................
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 93 1977
1978
MINIMUM TEMPERATURE (F) 55 36 1984
SUNRISE AND SUNSET
SEPTEMBER 19 2020.....SUNRISE 6:55 AM EDT SUNSET 7:11 PM EDT
SEPTEMBER 20 2020.....SUNRISE 6:56 AM EDT SUNSET 7:09 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$