381
CDUS41 KPHI 170557
CLIABE
CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
157 AM EDT WED SEP 17 2025
...............................
..THE ALLENTOWN PA CLIMATE SUMMARY FOR SEPTEMBER 16 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1922 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 77 1:07 PM 95 1991 78 -1 78
MINIMUM 55 4:38 AM 38 1923 55 0 48
AVERAGE 66 66 0 63
PRECIPITATION (IN)
YESTERDAY T 6.37 1999 0.17 -0.17 0.00
MONTH TO DATE 2.07 2.40 -0.33 0.44
SINCE SEP 1 2.07 2.40 -0.33 0.44
SINCE JAN 1 30.37 33.68 -3.31 35.06
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2001 0.0 0.0 0.0
2002
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 2
MONTH TO DATE 9 17 -8 27
SINCE SEP 1 9 17 -8 27
SINCE JUL 1 21 21 0 36
COOLING
YESTERDAY 1 3 -2 0
MONTH TO DATE 43 78 -35 23
SINCE SEP 1 43 78 -35 23
SINCE JAN 1 862 938 -76 959
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 8.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 46 2:00 PM
AVERAGE 70
......................................................
THE ALLENTOWN PA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 93 1991
MINIMUM TEMPERATURE (F) 55 39 1959
1986
2007
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 6:45 AM EDT SUNSET 7:07 PM EDT
SEPTEMBER 18 2025.....SUNRISE 6:46 AM EDT SUNSET 7:05 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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