521
CDUS41 KPHI 182153
CLIABE
CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
453 PM EST THU DEC 18 2025
...............................
..THE ALLENTOWN PA CLIMATE SUMMARY FOR DECEMBER 18 2025
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 49 2:49 PM 62 2006 42 7 50
MINIMUM 18 7:17 AM 5 1945 26 -8 25
AVERAGE 34 34 0 38
PRECIPITATION (IN)
TODAY 0.00 2.17 1915 0.12 -0.12 0.20
MONTH TO DATE 1.08 2.39 -1.31 2.33
SINCE DEC 1 1.08 2.39 -1.31 2.33
SINCE JAN 1 36.05 45.89 -9.84 40.53
SNOWFALL (IN)
TODAY 0.0 5.8 1932 0.1 -0.1 0.0
MONTH TO DATE 6.2 2.4 3.8 0.3
SINCE DEC 1 6.2 2.4 3.8 0.3
SINCE JUL 1 6.4 3.5 2.9 0.3
SNOW DEPTH 2
DEGREE DAYS
HEATING
TODAY 31 31 0 27
MONTH TO DATE 681 513 168 562
SINCE DEC 1 681 513 168 562
SINCE JUL 1 1693 1549 144 1431
COOLING
TODAY 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 10 HIGHEST WIND DIRECTION SE (120)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 3.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 4:00 AM
LOWEST 58 1:00 PM
AVERAGE 77
......................................................
THE ALLENTOWN PA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 42 59 1957
MINIMUM TEMPERATURE (F) 26 0 1951
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 7:21 AM EST SUNSET 4:37 PM EST
DECEMBER 19 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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