367  
CDUS41 KLWX 190522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT WED APR 19 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 18 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 73 3:08 PM 90 1976 68 5 44  
MINIMUM 42 6:07 AM 29 2018 44 -2 36  
AVERAGE 58 56 2 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.59 1978 0.11 -0.11 0.54  
MONTH TO DATE 0.36 1.98 -1.62 2.22  
SINCE MAR 1 1.93 5.48 -3.55 4.14  
SINCE JAN 1 5.56 11.03 -5.47 10.34  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2022 0.0 0.0 T  
MONTH TO DATE 0.0 0.1 -0.1 T  
SINCE MAR 1 T 4.0 -4.0 3.5  
SINCE JUL 1 0.4 21.0 -20.6 15.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 7 10 -3 25  
MONTH TO DATE 122 226 -104 226  
SINCE MAR 1 692 873 -181 749  
SINCE JUL 1 3646 4383 -737 3823  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 36 7 29 8  
SINCE MAR 1 37 9 28 11  
SINCE JAN 1 37 9 28 11    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 11.0  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 6:00 AM  
LOWEST 13 4:00 PM  
AVERAGE 42  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 91 2002  
MINIMUM TEMPERATURE (F) 44 27 1990  
2001  
 
SUNRISE AND SUNSET  
APRIL 19 2023.........SUNRISE 6:28 AM EDT SUNSET 7:51 PM EDT  
APRIL 20 2023.........SUNRISE 6:26 AM EDT SUNSET 7:52 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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