517  
CDUS41 KPHI 210556  
CLIABE  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
1254 AM EST FRI DEC 21 2018  
 
   
...............................
 
 
   
..THE ALLENTOWN PA CLIMATE SUMMARY FOR DECEMBER 20 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1922 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 52 1159 PM 63 1957 39 13 50  
MINIMUM 23 730 AM -2 1951 23 0 30  
1942  
AVERAGE 38 31 7 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.48 2.19 1957 0.11 0.37 0.00  
MONTH TO DATE 2.76 2.47 0.29 0.70  
SINCE DEC 1 2.76 2.47 0.29 0.70  
SINCE JAN 1 63.48 44.24 19.24 49.00  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.2 1966 0.2 -0.2 0.0  
MONTH TO DATE T 2.9 -2.9 7.9  
SINCE DEC 1 T 2.9 -2.9 7.9  
SINCE JUL 1 8.1 3.6 4.5 7.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 34 -7 25  
MONTH TO DATE 589 624 -35 606  
SINCE DEC 1 589 624 -35 606  
SINCE JUL 1 1652 1804 -152 1519  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1287 757 530 1004    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 5.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 500 PM  
LOWEST 64 100 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE ALLENTOWN PA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 39 57 1957  
MINIMUM TEMPERATURE (F) 23 -3 1942  
 
 
SUNRISE AND SUNSET  
DECEMBER 21 2018......SUNRISE 722 AM EST SUNSET 438 PM EST  
DECEMBER 22 2018......SUNRISE 723 AM EST SUNSET 438 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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