| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 35°F | 23°F | 1.0" |
| February | 20°F | 43°F | 30°F | 0.8" |
| March | 32°F | 61°F | 45°F | 6.5" |
| April | 38°F | 64°F | 50°F | 8.3" |
| May | 49°F | 77°F | 62°F | 2.9" |
| June | 59°F | 84°F | 71°F | 6.5" |
| July | 65°F | 93°F | 78°F | 8.4" |
| August | 64°F | 91°F | 76°F | 5.0" |
| September | 56°F | 86°F | 69°F | 2.1" |
| October | 42°F | 71°F | 55°F | 4.7" |
| November | 27°F | 59°F | 41°F | 3.1" |
| December | 15°F | 38°F | 25°F | 1.3" |
| Index | Indianola | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 252,184 | 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 | 0.004% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cambridge, NE | 1,285 | 19 | 62.0% |
| McCook, NE | 7,555 | 19 | 62.0% |
| Danbury, NE | 52 | 19 | 62.0% |
| Bartley, NE | 438 | 19 | 62.0% |
| Lebanon, NE | 58 | 19 | 62.0% |
| Indianola, NE | 499 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Shishmaref, AK | 499 | 38 | 24.0% |
| Midway, AL | 499 | 52 | 4.0% |
| Wilmot, AR | 499 | 34 | 32.0% |
| Ephesus, GA | 499 | 38 | 24.0% |
| Sorento, IL | 499 | 54 | 8.0% |
| Indianola, NE | 499 | 19 | 62.0% |
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