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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 37°F | 28°F | 2.1" |
| February | 21°F | 38°F | 29°F | 2.0" |
| March | 34°F | 54°F | 43°F | 3.0" |
| April | 44°F | 66°F | 55°F | 4.3" |
| May | 54°F | 74°F | 63°F | 3.7" |
| June | 64°F | 84°F | 74°F | 6.0" |
| July | 66°F | 86°F | 76°F | 4.5" |
| August | 66°F | 86°F | 75°F | 4.2" |
| September | 57°F | 79°F | 67°F | 4.3" |
| October | 45°F | 64°F | 54°F | 3.9" |
| November | 36°F | 54°F | 44°F | 2.7" |
| December | 23°F | 38°F | 29°F | 2.4" |
| Index | Kinderhook | Illinois | National |
| Air quality index | 41 | 41 | 42 |
| Pollution index | 2,458,180 | 3,148,694 | 2,726,193 |
| Measurement | Total |
| Days measured | 241 |
| Days with good air quality | 208 |
| Days with moderate air quality | 33 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.120% |
| Mercury | 0.330% |
| City | Population | Air Quality Index | National Avg. |
| Barry, IL | 1,698 | 41 | 18.0% |
| New Canton, IL | 257 | 41 | 18.0% |
| Frankford, MO | 452 | 41 | 18.0% |
| Baylis, IL | 126 | 41 | 18.0% |
| Payson, IL | 1,398 | 41 | 18.0% |
| Kinderhook, IL | 307 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Caspar, CA | 307 | 33 | 34.0% |
| Oak Glen, CA | 307 | 89 | 78.0% |
| Glenwood, IN | 307 | 28 | 44.0% |
| Switz City, IN | 307 | 1 | 98.0% |
| Lake George, MN | 307 | 29 | 42.0% |
| Kinderhook, IL | 307 | 41 | 18.0% |
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