| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 32°F | 17°F | 0.2" |
| February | 11°F | 39°F | 23°F | 0.1" |
| March | 24°F | 55°F | 38°F | 0.4" |
| April | 32°F | 62°F | 46°F | 1.0" |
| May | 40°F | 71°F | 55°F | 2.0" |
| June | 50°F | 84°F | 67°F | 0.9" |
| July | 56°F | 93°F | 75°F | 0.3" |
| August | 53°F | 90°F | 71°F | 0.4" |
| September | 44°F | 80°F | 60°F | 1.0" |
| October | 32°F | 63°F | 46°F | 1.1" |
| November | 19°F | 47°F | 31°F | 0.5" |
| December | 4°F | 31°F | 16°F | 0.2" |
| Index | Thermopolis | Wyoming | National |
| Air quality index | 45 | 39 | 42 |
| Pollution index | 270,167 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 294 |
| Days with moderate air quality | 69 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| East Thermopolis, WY | 237 | 45 | 10.0% |
| Kirby, WY | 83 | 45 | 10.0% |
| Lucerne, WY | 483 | 45 | 10.0% |
| Thermopolis, WY | 2,747 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Greenwich, NJ | 2,747 | 51 | 2.0% |
| Marietta, OK | 2,746 | 43 | 14.0% |
| Tompkinsville, KY | 2,748 | 25 | 50.0% |
| Marshville, NC | 2,748 | 49 | 2.0% |
| Refugio, TX | 2,748 | 42 | 16.0% |
| Thermopolis, WY | 2,747 | 45 | 10.0% |
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