| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 66°F | 51°F | 2.3" |
| February | 45°F | 76°F | 59°F | 2.3" |
| March | 51°F | 83°F | 67°F | 3.3" |
| April | 58°F | 89°F | 73°F | 1.6" |
| May | 64°F | 95°F | 80°F | 3.7" |
| June | 74°F | 101°F | 87°F | 2.3" |
| July | 76°F | 101°F | 88°F | 2.9" |
| August | 74°F | 98°F | 85°F | 5.3" |
| September | 71°F | 93°F | 81°F | 5.7" |
| October | 62°F | 88°F | 74°F | 3.0" |
| November | 48°F | 75°F | 60°F | 5.2" |
| December | 41°F | 67°F | 53°F | 2.6" |
| Index | Terlingua | Texas | National |
| Air quality index | 28 | 52 | 42 |
| Pollution index | 212,433 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 354 |
| Days with good air quality | 319 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Study Butte, TX | 149 | 25 | 50.0% |
| Terlingua, TX | 110 | 28 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Naukati Bay, AK | 110 | 20 | 60.0% |
| Lower Santan Village, AZ | 110 | 74 | 48.0% |
| Talking Rock, GA | 110 | 43 | 14.0% |
| Masonville, IA | 110 | 39 | 22.0% |
| Media, IL | 110 | 29 | 42.0% |
| Terlingua, TX | 110 | 28 | 44.0% |
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