Precipitation Recalculations for 8 Prominent Pennsylvania Cities
January
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.171 2.483 2.899 3.165 2.791 2.429 2.700 2.805
Median (inches): 2.900 2.315 2.630 2.900 2.340 2.065 2.389 2.490
Mode (inches): 3.660 4.400 2.650 1.670 2.550 2.060 1.860 3.320
Standard Deviation (inches): 1.720 1.111 1.463 1.627 1.259 1.523 1.412 1.617
February
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 2.739 2.194 2.624 2.675 2.322 2.013 2.427 2.644
Median (inches): 2.610 2.040 2.405 2.810 2.130 1.860 2.365 2.200
Mode (inches): 2.370 1.620 1.350 2.440 1.730 0.890 3.780 3.520
Standard Deviation (inches): 1.164 1.078 1.248 1.259 1.096 1.142 1.097 1.545
March
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.526 2.850 3.475 3.781 3.259 2.571 3.655 3.303
Median (inches): 3.540 2.940 3.425 3.910 3.350 2.530 3.435 3.210
Mode (inches): 3.820 3.060 1.980 4.680 3.670 1.340 3.620 2.950
Standard Deviation (inches): 1.551 1.205 1.382 1.543 1.274 0.956 2.115 1.222
April
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.657 3.412 3.196 3.447 3.291 3.160 3.353 3.459
Median (inches): 3.450 2.985 2.875 3.050 3.150 2.945 3.070 3.000
Mode (inches): 3.500 2.240 2.800 2.920 3.260 2.480 1.980 4.220
Standard Deviation (inches): 1.898 1.504 1.503 1.645 1.364 1.557 1.636 1.705
May
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.891 3.308 3.852 3.524 3.642 3.426 4.006 3.638
Median (inches): 3.670 3.080 3.645 3.650 3.170 3.280 3.631 3.450
Mode (inches): 6.200 2.200 6.370 3.650 5.350 4.780 4.300 N/A
Standard Deviation (inches): 2.119 1.680 1.969 1.687 1.597 1.594 2.587 1.654
June
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.559 3.339 3.675 3.483 3.788 3.705 3.855 3.792
Median (inches): 3.530 2.840 3.295 3.390 3.740 3.540 3.500 3.505
Mode (inches): 3.660 1.750 3.460 2.590 3.790 1.450 2.200 5.740
Standard Deviation (inches): 1.839 1.797 2.449 2.056 2.059 1.866 1.932 2.410
July
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 4.299 3.503 3.621 4.088 3.856 3.700 3.632 4.151
Median (inches): 4.435 2.995 3.165 3.915 3.545 3.505 3.525 3.980
Mode (inches): 5.850 1.120 3.010 2.620 4.250 1.230 2.550 3.790
Standard Deviation (inches): 2.373 20.61 1.941 2.351 1.586 1.799 1.449 1.888
August
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 4.161 3.376 3.441 3.858 3.316 3.412 3.449 3.515
Median (inches): 3.665 3.040 3.000 3.710 2.980 3.025 3.185 3.180
Mode (inches): 2.140 3.520 2.970 5.950 1.790 2.040 2.790 2.280
Standard Deviation (inches): 2.400 2.001 1.866 2.105 1.775 1.883 1.836 1.658
September
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 4.219 4.012 3.420 3.567 2.894 3.578 3.466 3.697
Median (inches): 3.465 3.580 2.725 2.990 2.785 2.930 2.840 3.175
Mode (inches): 2.960 2.930 3.350 1.710 1.800 3.070 5.790 1.880
Standard Deviation (inches): 2.585 1.954 2.450 2.318 1.540 2.255 2.958 2.531
October
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.288 3.522 3.010 2.810 2.359 2.971 2.915 3.164
Median (inches): 2.840 3.340 2.625 2.590 2.210 2.430 2.500 2.730
Mode (inches): 6.840 1.720 1.400 2.160 2.270 N/A 2.260 N/A
Standard Deviation (inches): 2.121 1.845 1.955 1.517 1.373 1.852 1.795 2.019
November
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.565 3.740 3.186 3.195 2.826 3.138 3.235 3.710
Median (inches): 3.115 3.175 3.290 2.855 2.615 3.165 3.131 3.460
Mode (inches): 1.660 2.990 4.710 5.710 2.430 2.630 3.980 5.080
Standard Deviation (inches): 1.922 1.700 1.558 1.934 1.591 1.360 1.615 1.674
December
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.503 3.085 2.993 3.373 2.659 2.713 2.669 3.075
Median (inches): 3.395 2.950 2.734 3.060 2.420 2.690 2.420 2.870
Mode (inches): N/A 2.800 1.560 2.110 3.240 3.090 2.260 3.200
Standard Deviation (inches): 1.844 1.138 1.564 1.817 1.245 1.364 1.258 1.636
Monthly
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 3.426 3.232 3.283 3.413 3.084 3.067 3.284 3.404
Annual
  Allentown Erie Harrisburg Philadelphia Pittsburgh Scranton State College Williamsport
Average (inches): 43.71 39.06 39.24 41.11 37.13 36.67 38.94 40.78
Dates Used
City Dates Used in Analysis
Allentown January 1, 1948 through June 30, 2006
Erie January 1, 1926 through June 30, 2006
Harrisburg January 1, 1926 through December 31, 2003
Philadelphia January 1, 1948 through June 30, 2006
Pittsburgh January 1, 1948 through June 30, 2006
Scranton January 1, 1949 through June 30, 2006
State College January 1, 1926 through October 31, 2005
Williamsport May 1, 1948 through June 30, 2006
*There may be small gaps in data, however, they're negligible since it's such a large date range.*