Climatological Report (Monthly)
Issued by NWS Mt. Holly, NJ

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337
CXUS51 KPHI 012055
CLMABE

CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
455 PM EDT WED OCT 01 2025

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

...THE ALLENTOWN PA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1922 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             99   09/02/1980
                       09/03/1953
                       09/02/1953
 LOW              30   09/28/1947
HIGHEST           86   09/18         89      -3       85  09/01
                       09/28
LOWEST            47   09/08         40       7       44  09/09
                       09/09
AVG. MAXIMUM    79.1               77.4     1.7     75.7
AVG. MINIMUM    56.0               55.2     0.8     54.7
MEAN            67.6               66.3     1.3     65.2
DAYS MAX >= 90     0                2.0    -2.0        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       12.99   2011
 MINIMUM        0.12   1943
TOTALS          2.66               4.84   -2.18     1.30
DAILY AVG.      0.09               0.16   -0.07     0.04
DAYS >= .01        9                9.6    -0.6        8
DAYS >= .10        4                6.5    -2.5        5
DAYS >= .50        1                2.9    -1.9        0
DAYS >= 1.00       1                1.5    -0.5        0
GREATEST
 24 HR. TOTAL   1.88   09/04 TO 09/04               0.42

SNOWFALL (INCHES)
RECORDS
 TOTAL           0.0   MM
 SNOW DEPTH        0   MM
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0      0.0
SNOWDEPTH AVG.     0                                   0
DAYS >= TRACE      0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0
 24 HR TOTAL     0.0                                 0.0

DEGREE DAYS
HEATING TOTAL     14                 70     -56       39
 SINCE 7/1        26                 74     -48       48
COOLING TOTAL    100                108      -8       55
 SINCE 1/1       919                968     -49      991
................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.9
HIGHEST WIND SPEED/DIRECTION    21/200    DATE  09/04
                                21/280          09/25
HIGHEST GUST SPEED/DIRECTION    34/260    DATE  09/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.33
NUMBER OF DAYS FAIR           20
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       4
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HEAVY SNOW                 0
SNOW                      0     LIGHT SNOW                 0
SLEET                     0     FOG                       10
FOG W/VIS <= 1/4 MILE     2     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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