858  
CDUS41 KLWX 282127  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT MON MAY 28 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 28 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 72 359 PM 90 2012 78 -6 74  
1991  
MINIMUM 63 802 AM 37 1994 55 8 57  
AVERAGE 68 67 1 66  
 
PRECIPITATION (IN)  
TODAY 0.03 2.16 1982 0.15 -0.12 0.17  
MONTH TO DATE 6.55 4.09 2.46 6.79  
SINCE MAR 1 11.89 10.94 0.95 13.95  
SINCE JAN 1 18.28 16.36 1.92 17.39  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 11.9 22.0 -10.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 2 -2 0  
MONTH TO DATE 21 125 -104 140  
SINCE MAR 1 1210 1107 103 959  
SINCE JUL 1 4561 4697 -136 3852  
 
COOLING  
TODAY 3 4 -1 1  
MONTH TO DATE 143 60 83 51  
SINCE MAR 1 158 80 78 120  
SINCE JAN 1 163 80 83 120    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 5.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 84 300 PM  
AVERAGE 92  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 97 1969  
MINIMUM TEMPERATURE (F) 56 40 1997  
 
 
SUNRISE AND SUNSET  
MAY 28 2018...........SUNRISE 548 AM EDT SUNSET 827 PM EDT  
MAY 29 2018...........SUNRISE 548 AM EDT SUNSET 827 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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