022
CXUS51 KPHI 011531
CLMABE

CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1131 AM EDT THU OCT 01 2026

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

...THE ALLENTOWN PA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1922 TO 2026

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           88   09/01         89      -1       86  09/18
                                                          09/28
LOWEST            45   09/15         40       5       47  09/08
                                                          09/09
AVG. MAXIMUM    76.2               77.4    -1.2     79.1
AVG. MINIMUM    58.1               55.2     2.9     56.0
MEAN            67.2               66.3     0.9     67.6
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          4.44               4.84   -0.40     2.66
DAILY AVG.      0.15               0.16   -0.01     0.09
DAYS >= .01        9                9.6    -0.6        9
DAYS >= .10        8                6.5     1.5        4
DAYS >= .50        3                2.9     0.1        1
DAYS >= 1.00       1                1.5    -0.5        1
GREATEST
 24 HR. TOTAL   1.11   09/20 TO 09/20               1.88

SNOWFALL (INCHES)
RECORDS
 TOTAL           0.0
 SNOW DEPTH        0
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                0.0     0.0        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     40                 70     -30       14
 SINCE 7/1        40                 70     -30       26
COOLING TOTAL    112                108       4      100
 SINCE 1/1       982                968      14      919
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    30/020    DATE  09/26
HIGHEST GUST SPEED/DIRECTION    44/250    DATE  09/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.47
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       7
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HEAVY SNOW                 0
SNOW                      0     LIGHT SNOW                 0
SLEET                     0     FOG                       12
FOG W/VIS <= 1/4 MILE     0     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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