| 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 | Hartrandt | 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. |
| Brookhurst, WY | 114 | 42 | 16.0% |
| Bar Nunn, WY | 2,786 | 42 | 16.0% |
| Homa Hills, WY | 196 | 42 | 16.0% |
| Evansville, WY | 2,974 | 42 | 16.0% |
| Bessemer Bend, WY | 122 | 42 | 16.0% |
| Hartrandt, WY | 1,016 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Merrill, IA | 1,016 | 35 | 30.0% |
| Burrton, KS | 1,016 | 40 | 20.0% |
| Mount Vernon, MD | 1,016 | 41 | 18.0% |
| New Franklin, MO | 1,016 | 38 | 24.0% |
| Greene, RI | 1,016 | 44 | 12.0% |
| Hartrandt, WY | 1,016 | 42 | 16.0% |
Here are the best places to live in Wyoming
These are the 10 cheapest cities in Wyoming
See the best places to live in Hartrandt
Check out the 10 most dangerous cities in Wyoming