| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 37°F | 26°F | 0.2" |
| February | 19°F | 40°F | 28°F | 0.4" |
| March | 30°F | 56°F | 41°F | 1.1" |
| April | 40°F | 65°F | 51°F | 3.1" |
| May | 50°F | 75°F | 62°F | 5.1" |
| June | 61°F | 85°F | 72°F | 4.6" |
| July | 65°F | 87°F | 75°F | 3.3" |
| August | 63°F | 85°F | 73°F | 4.1" |
| September | 54°F | 79°F | 65°F | 2.6" |
| October | 42°F | 67°F | 52°F | 2.3" |
| November | 29°F | 54°F | 39°F | 1.0" |
| December | 18°F | 38°F | 27°F | 0.7" |
| Index | Clarks | Nebraska | National |
| Air quality index | 19 | 86 | 42 |
| Pollution index | 222,362 | 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 | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Benedict, NE | 282 | 19 | 62.0% |
| Hordville, NE | 205 | 19 | 62.0% |
| Stromsburg, NE | 1,028 | 19 | 62.0% |
| Marquette, NE | 259 | 19 | 62.0% |
| Overland, NE | 102 | 19 | 62.0% |
| Clarks, NE | 334 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Eckley, CO | 334 | 45 | 10.0% |
| Kapalua, HI | 334 | 15 | 70.0% |
| Crawfordsville, IA | 334 | 32 | 36.0% |
| Letts, IA | 334 | 32 | 36.0% |
| Bazine, KS | 334 | 15 | 70.0% |
| Clarks, NE | 334 | 19 | 62.0% |
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