| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 40°F | 26°F | 0.7" |
| February | 18°F | 48°F | 31°F | 0.4" |
| March | 27°F | 60°F | 41°F | 1.5" |
| April | 32°F | 63°F | 46°F | 2.5" |
| May | 41°F | 74°F | 56°F | 3.4" |
| June | 51°F | 84°F | 67°F | 5.5" |
| July | 60°F | 95°F | 76°F | 7.1" |
| August | 56°F | 89°F | 71°F | 1.7" |
| September | 46°F | 83°F | 63°F | 1.5" |
| October | 36°F | 69°F | 50°F | 5.2" |
| November | 26°F | 57°F | 40°F | 0.4" |
| December | 16°F | 40°F | 27°F | 1.1" |
| Index | Morrill | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 198,771 | 590,627 | 2,726,193 |
| Measurement | Total |
| Days measured | 113 |
| Days with good air quality | 110 |
| Days with moderate air quality | 3 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Torrington, WY | 6,597 | 19 | 62.0% |
| Gering, NE | 8,179 | 19 | 62.0% |
| Henry, NE | 89 | 19 | 62.0% |
| Scottsbluff, NE | 14,660 | 19 | 62.0% |
| Lyman, NE | 400 | 19 | 62.0% |
| Morrill, NE | 791 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Keiser, AR | 791 | 45 | 10.0% |
| Kernville, CA | 791 | 67 | 34.0% |
| Meadow Vale, KY | 791 | 49 | 2.0% |
| Grove City, MN | 791 | 32 | 36.0% |
| Deshler, NE | 791 | 19 | 62.0% |
| Morrill, NE | 791 | 19 | 62.0% |
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