607  
CDUS41 KLWX 110522  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST MON DEC 11 2023  
   
...............................  
 
   
..THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 10 2023  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 63 5:11 PM 67 1939 50 13 45  
1966  
MINIMUM 39 11:59 PM 4 1876 36 3 33  
AVERAGE 51 43 8 39  
 
PRECIPITATION (IN)  
YESTERDAY 1.21 2.23 1878 0.12 1.09 T  
MONTH TO DATE 2.19 1.16 1.03 0.53  
SINCE DEC 1 2.19 1.16 1.03 0.53  
SINCE JAN 1 31.44 39.57 -8.13 40.18  
 
SNOWFALL (IN)  
YESTERDAY 0.0 7.0 1904 0.0 0.0 0.0  
MONTH TO DATE T 0.4 -0.4 0.0  
SINCE DEC 1 T 0.4 -0.4 0.0  
SINCE JUL 1 T 0.5 -0.5 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 14 22 -8 26  
MONTH TO DATE 183 210 -27 201  
SINCE DEC 1 183 210 -27 201  
SINCE JUL 1 772 856 -84 814  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1710 1737 -27 1793    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 9.6  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 11:00 AM  
LOWEST 77 1:00 AM  
AVERAGE 89  
   
......................................................  
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 70 2021  
MINIMUM TEMPERATURE (F) 35 12 1880  
1904  
1917  
 
SUNRISE AND SUNSET  
DECEMBER 11 2023......SUNRISE 7:16 AM EST SUNSET 4:46 PM EST  
DECEMBER 12 2023......SUNRISE 7:17 AM EST SUNSET 4:46 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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