| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 36°F | 27°F | 3.5" |
| February | 18°F | 37°F | 27°F | 3.0" |
| March | 27°F | 49°F | 37°F | 3.6" |
| April | 37°F | 64°F | 50°F | 3.6" |
| May | 47°F | 73°F | 60°F | 4.1" |
| June | 56°F | 81°F | 68°F | 4.4" |
| July | 59°F | 84°F | 72°F | 4.6" |
| August | 58°F | 83°F | 70°F | 3.9" |
| September | 52°F | 77°F | 64°F | 3.6" |
| October | 42°F | 64°F | 52°F | 4.2" |
| November | 32°F | 53°F | 42°F | 3.1" |
| December | 24°F | 41°F | 32°F | 3.8" |
| Index | West Hill | Ohio | National |
| Air quality index | 42 | 40 | 42 |
| Pollution index | 4,768,850 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 276 |
| Days with moderate air quality | 89 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.005% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| New Wilmington, PA | 2,196 | 31 | 38.0% |
| Fredonia, PA | 320 | 31 | 38.0% |
| Volant, PA | 100 | 31 | 38.0% |
| New Castle Northwest, PA | 1,235 | 31 | 38.0% |
| Frizzleburg, PA | 340 | 31 | 38.0% |
| West Hill, OH | 2,031 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| WaKeeney, KS | 2,031 | 15 | 70.0% |
| Sainte-Anne-de-la-Pérade, QC | 2,031 | n/a | |
| Pablo, MT | 2,032 | 37 | 26.0% |
| Lucasville, OH | 2,030 | 14 | 72.0% |
| Waurika, OK | 2,030 | 26 | 48.0% |
| West Hill, OH | 2,031 | 42 | 16.0% |
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