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| September 2009 Climate Summary |
The September 2009 average temperature for the contiguous United States was above the long-term average. The average September temperature of 66.4 degrees F was 1.0 degree F above the 20th Century average. Precipitation across the contiguous United States in September averaged 2.48 inches, exactly the 1901-2000 average.
The average temperature in September 2009 for Pennsylvania was 61.4 F. This was -1.0 F cooler than the 1901-2000 (20th century) average, the 38th coolest September in 115 years. 2.70 inches of precipitation fell in September. This was -0.76 inches less than the 1901-2000 average, the 39th driest such month on record.
The monthly mean temperature at Harrisburg was 65.7 degrees F, which was -0.5 degree F below the 1971-2000 average. Precipitation for the month was 3.95 inches, which was 0.30 inches above the 1971-2000 average.
The monthly mean temperature at Williamsport was 63.9 degrees F, which as 0.8 degrees F above the 1971-2000 average. Precipitation for the month was 2.22 inches, which was -1.76 inches below the 1971-2000 average.
CLIMATE REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
535 AM EDT THU OCT 1 2009
...................................
...THE HARRISBURG PA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2009...
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1888 TO 2009
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 102 09/03/1953
09/02/1953
LOW 30 09/24/1963
HIGHEST 83 09/23 93 09/04
LOWEST 47 09/20 48 09/20
AVG. MAXIMUM 73.6 75.7 -2.1 77.1
AVG. MINIMUM 57.7 56.7 1.0 58.9
MEAN 65.7 66.2 -0.5 68.0
DAYS MAX >= 90 0 1.0 -1.0 3
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 14.97 1975
MINIMUM 0.65 1986
TOTALS 3.95 3.65 0.30 6.61
DAILY AVG. 0.13 0.12 0.01 0.22
DAYS >= .01 9 9.0 0.0 9
DAYS >= .10 7 6.0 1.0 8
DAYS >= .50 2 2.0 0.0 5
DAYS >= 1.00 1 1.0 0.0 2
GREATEST
24 HR. TOTAL 2.17 09/11 TO 09/11
SNOWFALL (INCHES)
RECORDS
TOTAL 0.0 MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 0.0
SNOWDEPTH AVG. 0 MM MM 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 MM 0 MM
24 HR TOTAL 0.0 09/30 TO 09/30
DEGREE_DAYS
HEATING TOTAL 48 52 -4 34
SINCE 7/1 50 53 -3 34
COOLING TOTAL 74 87 -13 131
SINCE 1/1 934 944 -10 1072
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 5.0
HIGHEST WIND SPEED/DIRECTION 22/270 DATE 09/29
HIGHEST GUST SPEED/DIRECTION 32/200 DATE 09/28
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 7
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 14
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 7
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 18 FOG W/VIS <= 1/4 MILE 0
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
RECORDS...
SEPT. 11TH...RECORD RAINFALL OF 2.17 INCHES. OLD RECORD 1.53 INCHES PREVIOUSLY
SET IN 1906.
________________________________________________________
CLIMATE REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
505 AM EDT THU OCT 1 2009
...................................
...THE WILLIAMSPORT PA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2009...
CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1895 TO 2009
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 102 09/03/1953
LOW 28 09/28/1947
HIGHEST 84 09/23 92 09/04
LOWEST 44 09/20 42 09/19
AVG. MAXIMUM 73.2 73.3 -0.1 76.3
AVG. MINIMUM 54.5 52.8 1.7 54.2
MEAN 63.9 63.1 0.8 65.2
DAYS MAX >= 90 0 1.0 -1.0 4
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 12.60 1999
MINIMUM 0.16 1943
TOTALS 2.22 3.98 -1.76 6.80
DAILY AVG. 0.07 0.13 -0.06 0.23
DAYS >= .01 7 9.0 -2.0 10
DAYS >= .10 5 6.0 -1.0 9
DAYS >= .50 2 2.0 0.0 5
DAYS >= 1.00 0 1.0 -1.0 2
GREATEST
24 HR. TOTAL 1.03 09/11 TO 09/12
SNOWFALL (INCHES)
RECORDS
TOTAL 0.0 MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 0.0
SNOWDEPTH AVG. 0 MM MM 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 MM 0 MM
24 HR TOTAL 0.0 09/30 TO 09/30
DEGREE_DAYS
HEATING TOTAL 76 116 -40 69
SINCE 7/1 81 134 -53 74
COOLING TOTAL 49 68 -19 85
SINCE 1/1 659 705 -46 724
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 4.4
HIGHEST WIND SPEED/DIRECTION 31/160 DATE 09/28
HIGHEST GUST SPEED/DIRECTION 45/170 DATE 09/28
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 12
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 9
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 6 RAIN 6
LIGHT RAIN 9 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 19 FOG W/VIS <= 1/4 MILE 9
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
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| September 2009 Statewide Temperature Ranks (NOAA) |
| September 2009 Statewide Precipitation Ranks (NOAA) |
| September 2009 Pennsylvania Monthly Departure from Normal Precipitation |
2009 Weather Features:
- Early (Earliest) Snow - October 15-16, 2009
- Heavy-Wet Snow Possible Thursday and Friday
- September 2009 Climate Summary
- Local Observer wins Thomas Jefferson Award
- August 2009 Climate Summary for Harrisburg and Williamsport
- Severe Weather Event - August 20, 2009
- Severe Weather of 9 August 2009
- Heavy Rains and Flooding - July 23, 2009
- Severe Weather of Sat July 11th
- Severe Weather Events - June 25&26, 2009
- Early (Earliest) Snow - October 15-16, 2009
- Heavy-Wet Snow Possible Thursday and Friday
- September 2009 Climate Summary
- Local Observer wins Thomas Jefferson Award
- August 2009 Climate Summary for Harrisburg and Williamsport
- Severe Weather Event - August 20, 2009
- Severe Weather Event - June 20, 2009
- Severe Weather Event - June 9, 2009
- Severe Weather Event - May 16, 2009
- Wet pattern of early May
- Heat Wave sets Record Highs
- Unusually warm weather in store.
- York County Straight Line Wind Damage Sunday afternoon Mar 29, 2009
- Tornado Damage in Lancaster County 29 March 2009
- Coastal Low and Deep Snow SE, March 1st-2nd, 2009
- Strong Winds, Feb 11th-12th, 2009
- Local Heavy Snow in Lancaster, PA Feb 3rd-4th, 2009
- Snow and Ice Storm, Jan 27-28th
- Low Temperatures Saturday 17 Jan
- State College Represents NWS at the PA Farm Show
- Heavy Snow in Central PA, Jan 10th
- Ice Storm then Heavy Rain in the South, Jan 6th-8th
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