909  
CDUS41 KLWX 100525  
CLIDCA  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST SUN DEC 10 2023  
   
...............................  
 
   
..THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 9 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 56 1:55 PM 71 1991 50 6 50  
MINIMUM 36 6:43 AM 4 1876 36 0 36  
AVERAGE 46 43 3 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.29 2009 0.12 -0.12 0.00  
MONTH TO DATE 0.98 1.04 -0.06 0.53  
SINCE DEC 1 0.98 1.04 -0.06 0.53  
SINCE JAN 1 30.23 39.45 -9.22 40.18  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.6 2005 0.1 -0.1 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 19 22 -3 22  
MONTH TO DATE 169 188 -19 175  
SINCE DEC 1 169 188 -19 175  
SINCE JUL 1 758 834 -76 788  
 
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 10 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 4.0  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 5:00 AM  
LOWEST 51 2:00 PM  
AVERAGE 72  
   
......................................................  
 
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 50 67 1939  
1966  
MINIMUM TEMPERATURE (F) 36 4 1876  
 
SUNRISE AND SUNSET  
DECEMBER 10 2023......SUNRISE 7:15 AM EST SUNSET 4:46 PM EST  
DECEMBER 11 2023......SUNRISE 7:16 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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