365  
CDUS41 KLWX 202126  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT SAT SEP 20 2008  
 
...................................  
 
...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR SEPTEMBER 20 2008...  
VALID TODAY AS OF 500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1971 TO 2000  
CLIMATE RECORD PERIOD 1871 TO 2008  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 75 341 PM 94 1895 78 -3 75  
MINIMUM 56 545 AM 41 1916 61 -5 60  
AVERAGE 66 69 -3 68  
 
PRECIPITATION (IN)  
TODAY 0.00 1.43 1938 0.13 -0.13 0.00  
MONTH TO DATE 4.11 2.55 1.56 0.60  
SINCE SEP 1 4.11 2.55 1.56 0.60  
SINCE JAN 1 37.66 28.81 8.85 21.64  
 
SNOWFALL (IN)  
TODAY 0.0 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 -1 0  
MONTH TO DATE 0 3 -3 10  
SINCE SEP 1 0 3 -3 10  
SINCE JUL 1 0 10 -10 10  
 
COOLING  
TODAY 1 6 -5 3  
MONTH TO DATE 231 157 74 168  
SINCE SEP 1 231 157 74 168  
SINCE JAN 1 1620 1456 164 1596    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 5.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 72 300 AM  
LOWEST 38 200 PM  
AVERAGE 55  
 
..........................................................  
 
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 96 1895  
MINIMUM TEMPERATURE (F) 60 41 1956  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2008.....SUNRISE 654 AM EDT SUNSET 708 PM EDT  
SEPTEMBER 21 2008.....SUNRISE 655 AM EDT SUNSET 706 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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