Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 26°F | 41°F | 33°F | 3.2" |
February | 26°F | 42°F | 33°F | 2.5" |
March | 34°F | 53°F | 42°F | 6.9" |
April | 43°F | 65°F | 53°F | 3.6" |
May | 52°F | 74°F | 63°F | 6.0" |
June | 61°F | 81°F | 71°F | 6.5" |
July | 66°F | 86°F | 76°F | 7.9" |
August | 63°F | 83°F | 73°F | 11.0" |
September | 56°F | 77°F | 66°F | 6.8" |
October | 46°F | 66°F | 55°F | 9.4" |
November | 37°F | 55°F | 45°F | 2.9" |
December | 31°F | 46°F | 38°F | 7.7" |
Index | Norristown | Pennsylvania | National |
Air quality index | 51 | 45 | 42 |
Pollution index | 12,485,100 | 4,584,805 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 180 |
Days with moderate air quality | 169 |
Days w/ poor A.Q. for sensitive groups | 16 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.020% |
Benzene | 0.100% |
Carbon Tetrachloride | 0.100% |
Lead | 0.120% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Doylestown, PA | 8,282 | 41 | 18.0% |
Pottsgrove, PA | 3,245 | 42 | 16.0% |
Royersford, PA | 4,760 | 42 | 16.0% |
Spring Mount, PA | 2,498 | 42 | 16.0% |
Gilbertsville, PA | 5,979 | 42 | 16.0% |
Norristown, PA | 34,392 | 51 | 2.0% |
City | Population | Air Quality Index | National Avg. |
University CDP (Orange County), FL | 34,379 | 43 | 14.0% |
Montgomery Village, MD | 34,413 | 47 | 6.0% |
Georgetown, KY | 34,362 | 42 | 16.0% |
University City, MO | 34,336 | 54 | 8.0% |
Socorro, TX | 34,329 | 53 | 6.0% |
Norristown, PA | 34,392 | 51 | 2.0% |