| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 35°F | 24°F | 1.4" |
| February | 18°F | 37°F | 26°F | 1.3" |
| March | 32°F | 55°F | 42°F | 2.0" |
| April | 42°F | 65°F | 52°F | 5.1" |
| May | 54°F | 76°F | 64°F | 6.3" |
| June | 64°F | 84°F | 73°F | 6.7" |
| July | 67°F | 88°F | 77°F | 4.2" |
| August | 65°F | 86°F | 75°F | 6.6" |
| September | 55°F | 78°F | 66°F | 5.9" |
| October | 44°F | 67°F | 54°F | 5.2" |
| November | 32°F | 53°F | 41°F | 3.9" |
| December | 21°F | 38°F | 28°F | 2.1" |
| Index | Plattsmouth | Nebraska | National |
| Air quality index | 40 | 86 | 42 |
| Pollution index | 747,023 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 283 |
| Days with moderate air quality | 82 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.050% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Avoca, NE | 225 | 31 | 38.0% |
| Thurman, IA | 172 | 40 | 20.0% |
| Weeping Water, NE | 1,011 | 40 | 20.0% |
| Glenwood, IA | 5,325 | 40 | 20.0% |
| Offutt AFB, NE | 5,280 | 40 | 20.0% |
| Plattsmouth, NE | 6,453 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Ewa Villages, HI | 6,452 | 30 | 40.0% |
| Sidney, NE | 6,451 | 19 | 62.0% |
| Bronxville, NY | 6,450 | 51 | 2.0% |
| Keene, TX | 6,456 | 33 | 34.0% |
| Eucalyptus Hills, CA | 6,448 | 64 | 28.0% |
| Plattsmouth, NE | 6,453 | 40 | 20.0% |
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