| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 32°F | 22°F | 1.2" |
| February | 18°F | 40°F | 28°F | 2.8" |
| March | 30°F | 57°F | 42°F | 7.7" |
| April | 37°F | 61°F | 47°F | 7.0" |
| May | 48°F | 72°F | 60°F | 9.5" |
| June | 59°F | 81°F | 69°F | 4.0" |
| July | 63°F | 89°F | 75°F | 3.1" |
| August | 62°F | 86°F | 73°F | 3.4" |
| September | 54°F | 81°F | 66°F | 2.1" |
| October | 39°F | 67°F | 52°F | 3.4" |
| November | 25°F | 56°F | 39°F | 4.1" |
| December | 14°F | 35°F | 24°F | 0.8" |
| Index | Callaway | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 28,159 | 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 | 0.000% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Merna, NE | 345 | 19 | 62.0% |
| Oconto, NE | 174 | 19 | 62.0% |
| Arnold, NE | 881 | 19 | 62.0% |
| Broken Bow, NE | 3,503 | 19 | 62.0% |
| Callaway, NE | 541 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| White Plains, AL | 541 | 43 | 14.0% |
| Center Ridge, AR | 541 | 45 | 10.0% |
| Friant, CA | 541 | 60 | 20.0% |
| Lynnville, IA | 541 | 39 | 22.0% |
| Ava, IL | 541 | 43 | 14.0% |
| Callaway, NE | 541 | 19 | 62.0% |
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