676  
CDUS41 KLWX 122122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT MON APR 12 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 12 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 64 9:58 AM 87 1977 66 -2 72  
MINIMUM 55 6:49 AM 23 1982 41 14 36  
AVERAGE 60 53 7 54  
 
PRECIPITATION (IN)  
TODAY T 1.45 2004 0.11 -0.11 0.24  
MONTH TO DATE 1.03 1.44 -0.41 0.72  
SINCE MAR 1 3.30 4.82 -1.52 2.71  
SINCE JAN 1 9.46 10.24 -0.78 9.28  
 
SNOWFALL (IN)  
TODAY MM 1.0 1973 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  
TODAY 5 12 -7 11  
MONTH TO DATE 119 166 -47 130  
SINCE MAR 1 634 813 -179 578  
SINCE JUL 1 3827 4403 -576 3722  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 5 0 5 0  
SINCE MAR 1 9 3 6 3  
SINCE JAN 1 9 3 6 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 5.7  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 7:00 AM  
LOWEST 60 1:00 AM  
AVERAGE 75  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 66 87 1977  
MINIMUM TEMPERATURE (F) 41 24 1990  
 
SUNRISE AND SUNSET  
APRIL 12 2021.........SUNRISE 6:37 AM EDT SUNSET 7:44 PM EDT  
APRIL 13 2021.........SUNRISE 6:36 AM EDT SUNSET 7:45 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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