


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