485  
CDUS41 KLWX 210526  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
124 AM EDT MON AUG 21 2017  
 
   
...............................
 
 
   
..THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR AUGUST 20 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 88 228 PM 101 1983 86 2 91  
MINIMUM 70 605 AM 50 1896 70 0 75  
AVERAGE 79 78 1 83  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 4.83 1963 0.09 -0.09 0.00  
MONTH TO DATE 3.54 1.95 1.59 2.10  
SINCE JUN 1 13.82 9.46 4.36 8.91  
SINCE JAN 1 28.61 25.42 3.19 24.24  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 1 6 -5 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 14 13 1 18  
MONTH TO DATE 278 274 4 377  
SINCE JUN 1 1178 1045 133 1279  
SINCE JAN 1 1376 1179 197 1407    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 6.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 1000 PM  
LOWEST 37 100 PM  
AVERAGE 57  
   
......................................................
 
 
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 100 1874  
MINIMUM TEMPERATURE (F) 69 53 1908  
 
 
SUNRISE AND SUNSET  
AUGUST 21 2017........SUNRISE 627 AM EDT SUNSET 754 PM EDT  
AUGUST 22 2017........SUNRISE 628 AM EDT SUNSET 753 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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