| 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 | Lost Springs | 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. |
| Orin, WY | 87 | 42 | 16.0% |
| Lost Springs, WY | 1 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Le Roy, IA | 1 | 39 | 22.0% |
| Weeki Wachee, FL | 1 | 30 | 40.0% |
| Clear Hills 152C, AB | 1 | n/a | |
| Mont-Valin, QC | 1 | n/a | |
| Réservoir-Dozois, QC | 1 | n/a | |
| Lost Springs, WY | 1 | 42 | 16.0% |
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