375  
CDUS41 KLWX 250526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT TUE MAY 25 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 24 2021
 
 
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)  
YESTERDAY  
MAXIMUM 79 1:41 AM 90 1964 77 2 69  
MINIMUM 59 11:59 PM 36 1963 55 4 60  
AVERAGE 69 66 3 65  
 
PRECIPITATION (IN)  
YESTERDAY 0.53 0.83 1994 0.16 0.37 T  
2005  
MONTH TO DATE 1.56 3.64 -2.08 2.25  
SINCE MAR 1 6.11 10.61 -4.50 9.80  
SINCE JAN 1 12.27 16.16 -3.89 16.37  
 
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 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  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 117 102 15 175  
SINCE MAR 1 932 1069 -137 1005  
SINCE JUL 1 4125 4579 -454 4149  
 
COOLING  
YESTERDAY 4 4 0 0  
MONTH TO DATE 52 55 -3 28  
SINCE MAR 1 78 77 1 31  
SINCE JAN 1 78 77 1 31    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 2:00 PM  
LOWEST 62 1:00 AM  
AVERAGE 78  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 92 1991  
MINIMUM TEMPERATURE (F) 56 36 1967  
 
SUNRISE AND SUNSET  
MAY 25 2021...........SUNRISE 5:50 AM EDT SUNSET 8:24 PM EDT  
MAY 26 2021...........SUNRISE 5:49 AM EDT SUNSET 8:25 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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