388  
CDUS41 KLWX 292130  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
530 PM EDT SAT MAY 29 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 29 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
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 60 12:11 AM 97 1969 78 -18 86  
MINIMUM 52 12:22 PM 40 1997 57 -5 66  
AVERAGE 56 67 -11 76  
 
PRECIPITATION (IN)  
TODAY 0.49 1.00 1984 0.16 0.33 0.08  
MONTH TO DATE 2.76 4.42 -1.66 2.40  
SINCE MAR 1 7.31 11.39 -4.08 9.95  
SINCE JAN 1 13.47 16.94 -3.47 16.52  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 T 4.0 -4.0 T  
SINCE JUL 1 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 9 2 7 0  
MONTH TO DATE 126 112 14 175  
SINCE MAR 1 941 1079 -138 1005  
SINCE JUL 1 4134 4589 -455 4149  
 
COOLING  
TODAY 0 4 -4 11  
MONTH TO DATE 83 75 8 65  
SINCE MAR 1 109 97 12 68  
SINCE JAN 1 109 97 12 68    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (50)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NE (40)  
AVERAGE WIND SPEED 11.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 3:00 AM  
LOWEST 77 4:00 PM  
AVERAGE 87  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 95 1987  
1991  
2006  
MINIMUM TEMPERATURE (F) 57 38 1996  
 
SUNRISE AND SUNSET  
MAY 29 2021...........SUNRISE 5:47 AM EDT SUNSET 8:28 PM EDT  
MAY 30 2021...........SUNRISE 5:47 AM EDT SUNSET 8:28 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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