| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 38°F | 26°F | 0.4" |
| February | 16°F | 39°F | 27°F | 0.7" |
| March | 25°F | 52°F | 37°F | 0.8" |
| April | 30°F | 58°F | 43°F | 1.8" |
| May | 39°F | 67°F | 52°F | 4.0" |
| June | 48°F | 80°F | 64°F | 2.2" |
| July | 56°F | 90°F | 73°F | 1.3" |
| August | 54°F | 88°F | 70°F | 1.1" |
| September | 45°F | 78°F | 60°F | 1.1" |
| October | 34°F | 61°F | 46°F | 1.2" |
| November | 23°F | 49°F | 35°F | 0.5" |
| December | 12°F | 35°F | 24°F | 0.5" |
| Index | Upton | Wyoming | National |
| Air quality index | 40 | 39 | 42 |
| Pollution index | 486,607 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 309 |
| Days with moderate air quality | 55 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.080% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Highland, AR | 1,232 | 36 | 28.0% |
| Indian Shores, FL | 1,232 | 43 | 14.0% |
| Edmore, MI | 1,232 | 38 | 24.0% |
| Litchfield, MI | 1,232 | 39 | 22.0% |
| Country Club Hills, MO | 1,232 | 54 | 8.0% |
| Upton, WY | 1,232 | 40 | 20.0% |
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