| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 38°F | 26°F | 0.1" |
| February | 19°F | 42°F | 29°F | 0.3" |
| March | 30°F | 57°F | 41°F | 0.8" |
| April | 39°F | 65°F | 50°F | 4.1" |
| May | 50°F | 74°F | 61°F | 4.5" |
| June | 61°F | 85°F | 72°F | 5.4" |
| July | 65°F | 89°F | 76°F | 3.3" |
| August | 62°F | 85°F | 73°F | 4.1" |
| September | 54°F | 80°F | 65°F | 3.1" |
| October | 41°F | 66°F | 52°F | 3.6" |
| November | 28°F | 54°F | 39°F | 0.8" |
| December | 17°F | 38°F | 26°F | 0.6" |
| Index | Shelton | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 19,659 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 97 |
| Days with good air quality | 92 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.000% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Alda, NE | 597 | 19 | 62.0% |
| Heartwell, NE | 93 | 19 | 62.0% |
| Gibbon, NE | 1,971 | 19 | 62.0% |
| Poole, NE | 14 | 19 | 62.0% |
| Juniata, NE | 682 | 19 | 62.0% |
| Shelton, NE | 1,241 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Del Rio, CA | 1,241 | 49 | 2.0% |
| Willow Creek, CA | 1,241 | 27 | 46.0% |
| Van Buren, MO | 1,241 | 26 | 48.0% |
| Prospect, OH | 1,241 | 46 | 8.0% |
| Lot 59, PE | 1,241 | n/a | |
| Shelton, NE | 1,241 | 19 | 62.0% |
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