| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 40°F | 26°F | 0.3" |
| February | 15°F | 41°F | 27°F | 0.5" |
| March | 25°F | 55°F | 38°F | 0.7" |
| April | 30°F | 60°F | 44°F | 1.7" |
| May | 38°F | 69°F | 52°F | 2.8" |
| June | 48°F | 83°F | 65°F | 1.3" |
| July | 56°F | 92°F | 73°F | 0.9" |
| August | 53°F | 89°F | 70°F | 1.0" |
| September | 43°F | 80°F | 60°F | 0.8" |
| October | 32°F | 63°F | 46°F | 1.0" |
| November | 22°F | 52°F | 36°F | 0.3" |
| December | 11°F | 38°F | 24°F | 0.4" |
| Index | Manville | Wyoming | National |
| Air quality index | 19 | 39 | 42 |
| Pollution index | 106,337 | 1,779,975 | 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 | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lusk, WY | 1,589 | 19 | 62.0% |
| Manville, WY | 107 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Newhalen, AK | 107 | 31 | 38.0% |
| Casa, AR | 107 | 38 | 24.0% |
| Fifty-Six, AR | 107 | 36 | 28.0% |
| Timber Cove, CA | 107 | 34 | 32.0% |
| Bark Ranch, CO | 107 | 47 | 6.0% |
| Manville, WY | 107 | 19 | 62.0% |
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