333  
CDUS41 KLWX 222122  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT FRI SEP 22 2017  
 
   
...............................
 
 
 
...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR SEPTEMBER 22 2017...  
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1871 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE  
VALUE (LST) VALUE VALUE FROM  
NORMAL    
...........................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 83 249 PM 98 1895 77 6  
MINIMUM 70 508 AM 39 1904 60 10  
AVERAGE 77 69 8  
 
PRECIPITATION (IN)  
TODAY 0.00 1.53 1994 0.13 -0.13  
MONTH TO DATE 1.43 2.68 -1.25  
SINCE SEP 1 1.43 2.68 -1.25  
SINCE JAN 1 31.08 29.08 2.00  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 -1  
MONTH TO DATE 5 -2  
SINCE SEP 1 5 -2  
SINCE JUL 1 5 -2  
 
COOLING  
TODAY 12 7  
MONTH TO DATE 157 -17  
SINCE SEP 1 157 -17  
SINCE JAN 1 1648 163    
...........................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 6.0  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90  
LOWEST 55  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 98 1895  
MINIMUM TEMPERATURE (F) 60 36 1904  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 22 2017.....SUNRISE 656 AM EDT SUNSET 705 PM EDT  
SEPTEMBER 23 2017.....SUNRISE 657 AM EDT SUNSET 703 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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