356  
CDUS41 KLWX 282122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT FRI MAY 28 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 28 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 74 11:27 AM 90 1991 78 -4 85  
2012  
2019  
MINIMUM 65 5:18 AM 37 1994 57 8 70  
AVERAGE 70 67 3 78  
 
PRECIPITATION (IN)  
TODAY T 2.16 1982 0.16 -0.16 0.07  
MONTH TO DATE 2.01 4.26 -2.25 2.32  
SINCE MAR 1 6.56 11.23 -4.67 9.87  
SINCE JAN 1 12.72 16.78 -4.06 16.44  
 
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 0 2 -2 0  
MONTH TO DATE 117 110 7 175  
SINCE MAR 1 932 1077 -145 1005  
SINCE JUL 1 4125 4587 -462 4149  
 
COOLING  
TODAY 5 4 1 13  
MONTH TO DATE 86 71 15 54  
SINCE MAR 1 112 93 19 57  
SINCE JAN 1 112 93 19 57    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 7.4  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 2:00 PM  
LOWEST 48 12:00 AM  
AVERAGE 62  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 97 1969  
MINIMUM TEMPERATURE (F) 57 40 1997  
 
SUNRISE AND SUNSET  
MAY 28 2021...........SUNRISE 5:48 AM EDT SUNSET 8:27 PM EDT  
MAY 29 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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