| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 3°F | 31°F | 15°F | 0.4" |
| February | 12°F | 39°F | 25°F | 0.7" |
| March | 26°F | 57°F | 40°F | 1.0" |
| April | 34°F | 63°F | 47°F | 2.0" |
| May | 43°F | 73°F | 57°F | 4.8" |
| June | 51°F | 84°F | 67°F | 1.8" |
| July | 60°F | 97°F | 78°F | 0.1" |
| August | 54°F | 90°F | 71°F | 1.6" |
| September | 45°F | 80°F | 61°F | 1.1" |
| October | 36°F | 63°F | 47°F | 3.9" |
| November | 22°F | 49°F | 34°F | 1.0" |
| December | 7°F | 30°F | 17°F | 0.8" |
| Index | Cowley | Wyoming | National |
| Air quality index | 21 | 39 | 42 |
| Pollution index | 218,962 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 357 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 1 |
| 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. |
| Garland, WY | 193 | 21 | 58.0% |
| Byron, WY | 493 | 21 | 58.0% |
| Lovell, WY | 2,322 | 21 | 58.0% |
| Deaver, WY | 111 | 21 | 58.0% |
| Powell, WY | 6,238 | 21 | 58.0% |
| Cowley, WY | 667 | 21 | 58.0% |
| City | Population | Air Quality Index | National Avg. |
| Happy Valley, AK | 667 | 31 | 38.0% |
| Yarnell, AZ | 667 | 43 | 14.0% |
| Glen St. Mary, FL | 667 | 38 | 24.0% |
| Russell, IA | 667 | 39 | 22.0% |
| Paris, ID | 667 | 44 | 12.0% |
| Cowley, WY | 667 | 21 | 58.0% |
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