037
CDUS41 KPHI 170553
CLIABE
CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1253 AM EST WED DEC 17 2025
...............................
..THE ALLENTOWN PA CLIMATE SUMMARY FOR DECEMBER 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 28 2:59 PM 61 2021 43 -15 42
MINIMUM 10 7:53 AM 1 1951 27 -17 32
AVERAGE 19 35 -16 37
PRECIPITATION (IN)
YESTERDAY 0.00 1.30 2005 0.12 -0.12 0.42
MONTH TO DATE 1.08 2.15 -1.07 2.13
SINCE DEC 1 1.08 2.15 -1.07 2.13
SINCE JAN 1 36.05 45.65 -9.60 40.33
SNOWFALL (IN)
YESTERDAY 0.0 9.2 2020 0.1 -0.1 T
MONTH TO DATE 6.2 2.1 4.1 0.3
SINCE DEC 1 6.2 2.1 4.1 0.3
SINCE JUL 1 6.4 3.2 3.2 0.3
SNOW DEPTH 4
DEGREE DAYS
HEATING
YESTERDAY 46 30 16 28
MONTH TO DATE 611 452 159 514
SINCE DEC 1 611 452 159 514
SINCE JUL 1 1623 1488 135 1383
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 924 981 -57 994
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION SW (240)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 5.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 8:00 AM
LOWEST 48 12:00 PM
AVERAGE 68
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THE ALLENTOWN PA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 43 63 2000
MINIMUM TEMPERATURE (F) 27 -2 1951
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 7:20 AM EST SUNSET 4:36 PM EST
DECEMBER 18 2025......SUNRISE 7:21 AM EST SUNSET 4:37 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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