| 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 | Bechtelsville | Pennsylvania | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 8,206,310 | 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 | 0.260% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.160% |
| Mercury | 1.120% |
| City | Population | Air Quality Index | National Avg. |
| Kenilworth, PA | 2,046 | 42 | 16.0% |
| Royersford, PA | 4,760 | 42 | 16.0% |
| Spring City, PA | 3,307 | 42 | 16.0% |
| Boyertown, PA | 4,061 | 42 | 16.0% |
| Mount Penn, PA | 3,112 | 42 | 16.0% |
| Bechtelsville, PA | 916 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| St. Michaels, AZ | 916 | 17 | 66.0% |
| La Veta, CO | 916 | 20 | 60.0% |
| Mounds, IL | 916 | 44 | 12.0% |
| Laurie, MO | 916 | 39 | 22.0% |
| Temple, OK | 916 | 43 | 14.0% |
| Bechtelsville, PA | 916 | 42 | 16.0% |
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