| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 45°F | 34°F | 3.8" |
| February | 26°F | 48°F | 36°F | 3.1" |
| March | 36°F | 60°F | 48°F | 4.7" |
| April | 45°F | 72°F | 59°F | 5.9" |
| May | 55°F | 79°F | 67°F | 4.9" |
| June | 64°F | 88°F | 76°F | 4.3" |
| July | 67°F | 90°F | 78°F | 5.2" |
| August | 66°F | 90°F | 77°F | 3.2" |
| September | 58°F | 84°F | 70°F | 4.2" |
| October | 46°F | 73°F | 59°F | 3.9" |
| November | 35°F | 60°F | 47°F | 4.1" |
| December | 29°F | 48°F | 38°F | 4.8" |
| Index | Spottsville | Kentucky | National |
| Air quality index | 45 | 45 | 42 |
| Pollution index | 1,436,290 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 244 |
| Days with moderate air quality | 111 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Hatfield, IN | 772 | 43 | 14.0% |
| Richland, IN | 506 | 43 | 14.0% |
| Anthoston, KY | 284 | 45 | 10.0% |
| Robards, KY | 481 | 45 | 10.0% |
| Melody Hill, IN | 3,481 | 45 | 10.0% |
| Spottsville, KY | 355 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Rockford Bay, ID | 355 | 43 | 14.0% |
| Latham, IL | 355 | 44 | 12.0% |
| Ransom, IL | 355 | 0 | 100.0% |
| Gridley, KS | 355 | 22 | 56.0% |
| Branch, LA | 355 | 41 | 18.0% |
| Spottsville, KY | 355 | 45 | 10.0% |
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