| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 46°F | 36°F | 3.5" |
| February | 28°F | 48°F | 37°F | 3.1" |
| March | 38°F | 61°F | 49°F | 4.6" |
| April | 48°F | 73°F | 60°F | 6.3" |
| May | 57°F | 80°F | 68°F | 5.3" |
| June | 66°F | 88°F | 77°F | 4.5" |
| July | 69°F | 90°F | 79°F | 4.7" |
| August | 68°F | 90°F | 79°F | 4.2" |
| September | 61°F | 84°F | 72°F | 4.4" |
| October | 49°F | 73°F | 60°F | 4.4" |
| November | 37°F | 61°F | 48°F | 3.4" |
| December | 31°F | 49°F | 39°F | 5.1" |
| Index | Fredericksburg | Indiana | National |
| Air quality index | 49 | 56 | 42 |
| Pollution index | 621,794 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 195 |
| Days with moderate air quality | 166 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Hardinsburg, IN | 141 | 6 | 88.0% |
| English, IN | 955 | 6 | 88.0% |
| Marengo, IN | 658 | 6 | 88.0% |
| Livonia, IN | 76 | 35 | 30.0% |
| Salem, IN | 6,193 | 35 | 30.0% |
| Fredericksburg, IN | 41 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Tatitlek, AK | 41 | 31 | 38.0% |
| Tinsman, AR | 41 | 35 | 30.0% |
| Two Buttes, CO | 41 | 20 | 60.0% |
| Conway, IA | 41 | 43 | 14.0% |
| Irvington, IA | 41 | 15 | 70.0% |
| Fredericksburg, IN | 41 | 49 | 2.0% |
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