264  
CDUS41 KLWX 240523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT MON MAY 24 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 23 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 92R 4:07 PM 92 1964 77 15 83  
MINIMUM 63 3:25 AM 39 1971 55 8 60  
1990  
2002  
AVERAGE 78 66 12 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.40 2010 0.16 -0.16 0.23  
MONTH TO DATE 1.03 3.48 -2.45 2.25  
SINCE MAR 1 5.58 10.45 -4.87 9.80  
SINCE JAN 1 11.74 16.00 -4.26 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 99 18 175  
SINCE MAR 1 932 1066 -134 1005  
SINCE JUL 1 4125 4576 -451 4149  
 
COOLING  
YESTERDAY 13 4 9 7  
MONTH TO DATE 48 51 -3 28  
SINCE MAR 1 74 73 1 31  
SINCE JAN 1 74 73 1 31    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 8.6  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 4:00 AM  
LOWEST 36 3:00 PM  
AVERAGE 57  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 90 1964  
MINIMUM TEMPERATURE (F) 55 36 1963  
 
SUNRISE AND SUNSET  
MAY 24 2021...........SUNRISE 5:50 AM EDT SUNSET 8:24 PM EDT  
MAY 25 2021...........SUNRISE 5:50 AM EDT SUNSET 8:24 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page