| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 37°F | 23°F | 0.9" |
| February | 16°F | 45°F | 29°F | 0.5" |
| March | 25°F | 55°F | 39°F | 1.3" |
| April | 31°F | 60°F | 44°F | 2.1" |
| May | 38°F | 70°F | 53°F | 5.7" |
| June | 48°F | 83°F | 65°F | 1.8" |
| July | 57°F | 94°F | 76°F | 2.0" |
| August | 53°F | 89°F | 70°F | 2.2" |
| September | 44°F | 81°F | 61°F | 1.8" |
| October | 35°F | 65°F | 48°F | 3.0" |
| November | 24°F | 54°F | 38°F | 0.9" |
| December | 10°F | 35°F | 22°F | 0.6" |
| Index | Glenrock | 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. |
| Meadow Acres, WY | 70 | 42 | 16.0% |
| Rolling Hills, WY | 606 | 42 | 16.0% |
| Glenrock, WY | 2,576 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Mohawk, NY | 2,575 | 27 | 46.0% |
| Yorkville, NY | 2,575 | 27 | 46.0% |
| Jefferson, MD | 2,577 | 40 | 20.0% |
| Maine, WI | 2,577 | 34 | 32.0% |
| Hébertville, QC | 2,577 | n/a | |
| Glenrock, WY | 2,576 | 42 | 16.0% |
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