| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 41°F | 31°F | 2.3" |
| February | 21°F | 42°F | 31°F | 2.6" |
| March | 30°F | 54°F | 41°F | 3.0" |
| April | 40°F | 66°F | 53°F | 3.5" |
| May | 50°F | 75°F | 62°F | 4.2" |
| June | 60°F | 82°F | 71°F | 3.7" |
| July | 63°F | 86°F | 75°F | 4.6" |
| August | 61°F | 84°F | 72°F | 4.7" |
| September | 54°F | 78°F | 65°F | 5.1" |
| October | 44°F | 67°F | 55°F | 4.8" |
| November | 33°F | 56°F | 44°F | 2.7" |
| December | 27°F | 46°F | 36°F | 3.3" |
| Index | Idaville | Pennsylvania | National |
| Air quality index | 42 | 45 | 42 |
| Pollution index | 12,532,500 | 4,584,805 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 288 |
| Days with moderate air quality | 77 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.180% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.130% |
| Mercury | 0.270% |
| City | Population | Air Quality Index | National Avg. |
| Newville, PA | 1,231 | 36 | 28.0% |
| East Berlin, PA | 1,570 | 41 | 18.0% |
| Wellsville, PA | 257 | 41 | 18.0% |
| Abbottstown, PA | 884 | 42 | 16.0% |
| New Oxford, PA | 1,775 | 42 | 16.0% |
| Idaville, PA | 205 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| College City, CA | 205 | 44 | 12.0% |
| Castana, IA | 205 | 35 | 30.0% |
| Coulter, IA | 205 | 15 | 70.0% |
| Sherrill, IA | 205 | 29 | 42.0% |
| Onaway, ID | 205 | 10 | 80.0% |
| Idaville, PA | 205 | 42 | 16.0% |
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