797  
CDUS41 KLWX 170525  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT TUE OCT 17 2017  
 
   
...............................
 
 
   
..THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR OCTOBER 16 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 73 1234 AM 89 1897 68 5 73  
1881  
MINIMUM 52 1159 PM 30 1876 50 2 53  
AVERAGE 63 59 4 63  
 
PRECIPITATION (IN)  
YESTERDAY 0.10 1.38 2002 0.11 -0.01 0.00  
MONTH TO DATE 0.83 1.77 -0.94 0.59  
SINCE SEP 1 2.26 5.49 -3.23 3.09  
SINCE JAN 1 31.91 31.89 0.02 28.02  
 
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 2 6 -4 2  
MONTH TO DATE 10 75 -65 38  
SINCE SEP 1 16 99 -83 39  
SINCE JUL 1 16 99 -83 39  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 84 28 56 19  
SINCE SEP 1 325 230 95 357  
SINCE JAN 1 1816 1541 275 1943    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 13.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 400 AM  
LOWEST 34 400 PM  
AVERAGE 64  
   
......................................................
 
 
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 86 1938  
1908  
MINIMUM TEMPERATURE (F) 50 33 1893  
1886  
 
 
SUNRISE AND SUNSET  
OCTOBER 17 2017.......SUNRISE 720 AM EDT SUNSET 626 PM EDT  
OCTOBER 18 2017.......SUNRISE 721 AM EDT SUNSET 625 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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