| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 40°F | 28°F | 0.3" |
| February | 20°F | 43°F | 30°F | 0.2" |
| March | 30°F | 57°F | 42°F | 0.9" |
| April | 39°F | 65°F | 50°F | 4.4" |
| May | 49°F | 74°F | 61°F | 3.4" |
| June | 61°F | 85°F | 72°F | 4.1" |
| July | 65°F | 89°F | 76°F | 3.1" |
| August | 62°F | 85°F | 72°F | 3.9" |
| September | 53°F | 80°F | 65°F | 2.1" |
| October | 41°F | 67°F | 52°F | 2.1" |
| November | 29°F | 54°F | 40°F | 0.6" |
| December | 19°F | 39°F | 28°F | 0.5" |
| Index | Franklin | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 106,281 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bloomington, NE | 123 | 19 | 62.0% |
| Naponee, NE | 135 | 19 | 62.0% |
| Republican City, NE | 173 | 19 | 62.0% |
| Campbell, NE | 341 | 19 | 62.0% |
| Riverton, NE | 73 | 19 | 62.0% |
| Franklin, NE | 926 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Sweet Home, AR | 926 | 45 | 10.0% |
| Henderson, MN | 926 | 46 | 8.0% |
| Diamond, MO | 926 | 37 | 26.0% |
| Tully, NY | 926 | 37 | 26.0% |
| Hauser, ID | 927 | 43 | 14.0% |
| Franklin, NE | 926 | 19 | 62.0% |
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