| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 41°F | 32°F | 2.9" |
| February | 23°F | 42°F | 32°F | 2.8" |
| March | 32°F | 53°F | 42°F | 3.4" |
| April | 42°F | 66°F | 53°F | 4.0" |
| May | 51°F | 75°F | 63°F | 4.0" |
| June | 61°F | 82°F | 71°F | 4.7" |
| July | 66°F | 87°F | 76°F | 4.9" |
| August | 63°F | 84°F | 73°F | 5.2" |
| September | 56°F | 78°F | 67°F | 4.7" |
| October | 45°F | 67°F | 56°F | 4.5" |
| November | 35°F | 55°F | 45°F | 2.6" |
| December | 29°F | 46°F | 37°F | 4.2" |
| Index | Elverson | Pennsylvania | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 2,654,190 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 279 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.000% |
| Mercury | 0.005% |
| City | Population | Air Quality Index | National Avg. |
| Churchtown, PA | 467 | 42 | 16.0% |
| Morgantown, PA | 1,541 | 42 | 16.0% |
| South Pottstown, PA | 2,237 | 42 | 16.0% |
| Jacksonwald, PA | 3,840 | 42 | 16.0% |
| Reading, PA | 88,333 | 42 | 16.0% |
| Elverson, PA | 1,369 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Basye, VA | 1,369 | 36 | 28.0% |
| Waldo, AR | 1,370 | 35 | 30.0% |
| Mexico Beach, FL | 1,370 | 38 | 24.0% |
| Avoca, IA | 1,368 | 40 | 20.0% |
| Holstein, IA | 1,370 | 35 | 30.0% |
| Elverson, PA | 1,369 | 42 | 16.0% |
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