| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 31°F | 22°F | 0.3" |
| February | 17°F | 36°F | 25°F | 0.3" |
| March | 24°F | 47°F | 34°F | 0.5" |
| April | 29°F | 55°F | 41°F | 0.9" |
| May | 37°F | 65°F | 50°F | 1.4" |
| June | 47°F | 79°F | 62°F | 0.5" |
| July | 55°F | 87°F | 71°F | 0.7" |
| August | 52°F | 83°F | 67°F | 0.7" |
| September | 44°F | 74°F | 58°F | 0.8" |
| October | 33°F | 59°F | 45°F | 0.7" |
| November | 23°F | 45°F | 33°F | 0.3" |
| December | 13°F | 31°F | 22°F | 0.2" |
| Index | Granger | Wyoming | National |
| Air quality index | 46 | 39 | 42 |
| Pollution index | 5,619,220 | 1,779,975 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 100 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.460% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.120% |
| Mercury | 0.270% |
| City | Population | Air Quality Index | National Avg. |
| Little America, WY | 29 | 46 | 8.0% |
| Granger, WY | 142 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Golovin, AK | 142 | 38 | 24.0% |
| Kaibab, AZ | 142 | 44 | 12.0% |
| Alpine Village, CA | 142 | 13 | 74.0% |
| Bluewater, CA | 142 | 13 | 74.0% |
| Comptche, CA | 142 | 33 | 34.0% |
| Granger, WY | 142 | 46 | 8.0% |
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