862  
CDUS41 KLWX 140522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT WED APR 14 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 13 2021
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 68 4:45 PM 87 1977 66 2 77  
MINIMUM 49 2:34 AM 24 1990 41 8 50  
AVERAGE 59 54 5 64  
 
PRECIPITATION (IN)  
YESTERDAY T 1.79 2020 0.11 -0.11 1.79  
MONTH TO DATE 1.09 1.55 -0.46 2.51  
SINCE MAR 1 3.36 4.93 -1.57 4.50  
SINCE JAN 1 9.52 10.35 -0.83 11.07  
 
SNOWFALL (IN)  
YESTERDAY MM T 1966 0.0 MM 0.0  
MONTH TO DATE T 0.2 -0.2 0.0  
SINCE MAR 1 T 3.0 -3.0 T  
SINCE JUL 1 12.0 21.9 -9.9 2.9  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 12 -6 1  
MONTH TO DATE 128 178 -50 131  
SINCE MAR 1 643 825 -182 579  
SINCE JUL 1 3836 4415 -579 3723  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 5 1 4 0  
SINCE MAR 1 9 4 5 3  
SINCE JAN 1 9 4 5 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 4.0  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 5:00 AM  
LOWEST 51 5:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 87 1960  
MINIMUM TEMPERATURE (F) 42 20 1975  
 
SUNRISE AND SUNSET  
APRIL 14 2021.........SUNRISE 6:34 AM EDT SUNSET 7:46 PM EDT  
APRIL 15 2021.........SUNRISE 6:33 AM EDT SUNSET 7:47 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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