401  
CDUS41 KPHI 160554  
CLIABE  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
1254 AM EST SAT DEC 16 2023  
   
...............................
 
 
   
..THE ALLENTOWN PA CLIMATE SUMMARY FOR DECEMBER 15 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1922 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 57 2:11 PM 66 2015 43 14 36  
MINIMUM 25 2:57 AM 6 1960 27 -2 28  
2005  
AVERAGE 41 35 6 32  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.89 1948 0.13 -0.13 0.72  
MONTH TO DATE 2.83 2.03 0.80 2.62  
SINCE DEC 1 2.83 2.03 0.80 2.62  
SINCE JAN 1 40.59 45.53 -4.94 44.66  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.0 1950 0.2 -0.2 1.3  
MONTH TO DATE T 2.0 -2.0 1.3  
SINCE DEC 1 T 2.0 -2.0 1.3  
SINCE JUL 1 T 3.1 -3.1 1.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 24 30 -6 33  
MONTH TO DATE 395 422 -27 440  
SINCE DEC 1 395 422 -27 440  
SINCE JUL 1 1482 1461 21 1541  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 790 981 -191 986    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (260)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 74 12:00 AM  
LOWEST 31 2:00 PM  
AVERAGE 53  
   
......................................................
 
 
THE ALLENTOWN PA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 61 2021  
MINIMUM TEMPERATURE (F) 27 1 1951  
 
SUNRISE AND SUNSET  
DECEMBER 16 2023......SUNRISE 7:19 AM EST SUNSET 4:36 PM EST  
DECEMBER 17 2023......SUNRISE 7:20 AM EST SUNSET 4:36 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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