| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 39°F | 27°F | 0.4" |
| February | 21°F | 43°F | 30°F | 0.5" |
| March | 32°F | 58°F | 43°F | 1.2" |
| April | 42°F | 67°F | 53°F | 3.2" |
| May | 52°F | 77°F | 63°F | 4.3" |
| June | 63°F | 87°F | 74°F | 4.1" |
| July | 67°F | 90°F | 78°F | 2.6" |
| August | 64°F | 87°F | 74°F | 4.0" |
| September | 55°F | 81°F | 66°F | 2.0" |
| October | 43°F | 69°F | 54°F | 2.3" |
| November | 31°F | 55°F | 41°F | 0.9" |
| December | 20°F | 40°F | 29°F | 0.7" |
| Index | Carleton | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 75,071 | 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 | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Deshler, NE | 791 | 19 | 62.0% |
| Ong, NE | 60 | 19 | 62.0% |
| Davenport, NE | 391 | 19 | 62.0% |
| Shickley, NE | 278 | 19 | 62.0% |
| Oak, NE | 13 | 19 | 62.0% |
| Carleton, NE | 199 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Macedonia, AL | 199 | 35 | 30.0% |
| Pleasant Plains, AR | 199 | 45 | 10.0% |
| Southern Ute, CO | 199 | 44 | 12.0% |
| Soldier, IA | 199 | 35 | 30.0% |
| Cave-In-Rock, IL | 199 | 44 | 12.0% |
| Carleton, NE | 199 | 19 | 62.0% |
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