375  
CDUS41 KLWX 180623  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
223 AM EDT THU SEP 18 2025  
   
...............................
 
 
...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR SEPTEMBER 17 2025...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 69 3:29 PM 96 1991 80 -11 81  
MINIMUM 62 6:25 AM 44 1923 64 -2 69  
AVERAGE 66 72 -6 75  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 3.26 1876 0.14 -0.10 0.10  
MONTH TO DATE 3.36 2.24 1.12 0.12  
SINCE SEP 1 3.36 2.24 1.12 0.12  
SINCE JAN 1 30.62 30.15 0.47 29.21  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 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 SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 1 8 -7 10  
MONTH TO DATE 111 168 -57 128  
SINCE SEP 1 111 168 -57 128  
SINCE JAN 1 1576 1620 -44 1843    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 14.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 11:00 AM  
LOWEST 80 12:00 AM  
AVERAGE 87  
   
......................................................
 
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 91 1898  
1921  
1927  
MINIMUM TEMPERATURE (F) 63 45 1937  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 6:52 AM EDT SUNSET 7:11 PM EDT  
SEPTEMBER 19 2025.....SUNRISE 6:53 AM EDT SUNSET 7:09 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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