894
CXUS51 KPHI 012213
CLMABE

CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
513 PM EST WED JAN 01 2025

...................................

...THE ALLENTOWN PA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1922 TO 2024

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             72   12/01/2006
                       12/04/1998
                       12/29/1984
 LOW              -9   12/31/1917
HIGHEST           62                 62       0       59
LOWEST             1                 12     -11       21
AVG. MAXIMUM    41.0               43.1    -2.1     46.7
AVG. MINIMUM    23.9               26.8    -2.9     31.8
MEAN            32.5               35.0    -2.5     39.3
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     4                5.0    -1.0        0
DAYS MIN <= 32    26               23.8     2.2       17
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.62   2023
 MINIMUM        0.39   1955
TOTALS          3.86               3.86    0.00     8.62
DAILY AVG.      0.12               0.12   -0.00     0.28
DAYS >= .01       15               11.5     3.5       13
DAYS >= .10        8                7.3     0.7        8
DAYS >= .50        2                2.8    -0.8        5
DAYS >= 1.00       1                1.0     0.0        4
GREATEST
 24 HR. TOTAL   1.25   12/10 TO 12/11               3.27

SNOWFALL (INCHES)
RECORDS
 TOTAL          28.4   1966
 24 HR TOTAL      MM
TOTALS           4.8                4.6     0.2        T
SINCE 7/1        4.8                5.7    -0.9        T
SNOWDEPTH AVG.     T                                   0
DAYS >= 1.0        5                1.0     4.0        0
GREATEST
 SNOW DEPTH        4   12/21                           0
 24 HR TOTAL     3.8   12/20 TO 12/21                  T

DEGREE DAYS
HEATING TOTAL   1001                932      69      790
 SINCE 7/1      1870               1970    -100       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1       994                981      13       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.8
HIGHEST WIND SPEED/DIRECTION    29/280    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    40/280    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.51
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       5
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HEAVY SNOW                 0
SNOW                      0     LIGHT SNOW                 8
SLEET                     1     FOG                       14
FOG W/VIS <= 1/4 MILE     4     HAZE                       0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

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