| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 14°F | 37°F | 26°F | 0.6" |
| February | 15°F | 41°F | 27°F | 0.6" |
| March | 23°F | 53°F | 37°F | 1.0" |
| April | 27°F | 60°F | 42°F | 1.6" |
| May | 36°F | 69°F | 51°F | 2.5" |
| June | 44°F | 83°F | 64°F | 1.2" |
| July | 52°F | 92°F | 72°F | 2.3" |
| August | 50°F | 89°F | 69°F | 1.1" |
| September | 42°F | 79°F | 59°F | 0.9" |
| October | 32°F | 64°F | 46°F | 1.3" |
| November | 23°F | 51°F | 36°F | 0.5" |
| December | 12°F | 36°F | 24°F | 0.9" |
| Index | Evansville | Wyoming | National |
| Air quality index | 42 | 39 | 42 |
| Pollution index | 873,248 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 327 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.140% |
| City | Population | Air Quality Index | National Avg. |
| Bar Nunn, WY | 2,786 | 42 | 16.0% |
| Hartrandt, WY | 1,016 | 42 | 16.0% |
| Vista West, WY | 724 | 42 | 16.0% |
| Brookhurst, WY | 114 | 42 | 16.0% |
| Bessemer Bend, WY | 122 | 42 | 16.0% |
| Evansville, WY | 2,974 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Granite Quarry, NC | 2,973 | 40 | 20.0% |
| Penbrook, PA | 2,973 | 44 | 12.0% |
| Navy Yard City, WA | 2,973 | 18 | 64.0% |
| East Kootenay F, BC | 2,973 | n/a | |
| La Pine, OR | 2,975 | 20 | 60.0% |
| Evansville, WY | 2,974 | 42 | 16.0% |
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