901
CXUS51 KPHI 020750
CLMABE
CLIMATE REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
250 AM EST TUE JAN 02 2024
...............................
..THE ALLENTOWN PA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023
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 59 59 0 59
LOWEST 21 8 13 3
AVG. MAXIMUM 46.7 43.1 3.6 42.1
AVG. MINIMUM 31.8 26.8 5.0 23.7
MEAN 39.3 35.0 4.3 32.9
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 4.8 -4.8 3
DAYS MIN <= 32 17 23.8 -6.8 27
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.89 1973
MINIMUM 0.39 1955
TOTALS 8.62 3.86 4.76 4.43
DAILY AVG. 0.28 0.12 0.16 0.14
DAYS >= .01 13 11.5 1.5 9
DAYS >= .10 8 7.3 0.7 8
DAYS >= .50 5 2.8 2.2 3
DAYS >= 1.00 4 1.0 3.0 1
GREATEST
24 HR. TOTAL 3.27 12/17 TO 12/18 1.35
SNOWFALL (INCHES)
RECORDS
TOTAL 28.4 1966
24 HR TOTAL MM
TOTALS T 4.6 -4.6 1.4
SINCE 7/1 T 5.7 -5.7 MM
SNOWDEPTH AVG. 0 -1
DAYS >= 1.0 0 1.4 -1.4 1
GREATEST
SNOW DEPTH 0 MM 12/29
12/30
12/16
24 HR TOTAL T MM
DEGREE DAYS
HEATING TOTAL 790 932 -142 989
SINCE 7/1 1877 1970 -93 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 790 981 -191 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.7
HIGHEST WIND SPEED/DIRECTION 36/080 DATE 12/28
HIGHEST GUST SPEED/DIRECTION 42/080 DATE 12/28
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.62
NUMBER OF DAYS FAIR 7
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 15
AVERAGE RH (PERCENT) 73
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 6 RAIN 8
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HEAVY SNOW 0
SNOW 0 LIGHT SNOW 6
SLEET 0 FOG 17
FOG W/VIS <= 1/4 MILE 2 HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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