| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 66°F | 52°F | 3.9" |
| February | 45°F | 73°F | 57°F | 3.2" |
| March | 54°F | 80°F | 65°F | 5.3" |
| April | 61°F | 86°F | 72°F | 7.4" |
| May | 67°F | 91°F | 78°F | 12.2" |
| June | 74°F | 96°F | 84°F | 10.8" |
| July | 76°F | 97°F | 86°F | 6.0" |
| August | 76°F | 98°F | 86°F | 10.5" |
| September | 70°F | 91°F | 80°F | 11.7" |
| October | 62°F | 85°F | 72°F | 6.3" |
| November | 51°F | 74°F | 61°F | 4.3" |
| December | 42°F | 65°F | 52°F | 3.6" |
| Index | Brackettville | Texas | National |
| Air quality index | 25 | 52 | 42 |
| Pollution index | 683,072 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 339 |
| Days with good air quality | 287 |
| Days with moderate air quality | 51 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Fort Clark Springs, TX | 1,487 | 25 | 50.0% |
| Spofford, TX | 78 | 25 | 50.0% |
| Brackettville, TX | 1,642 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Ordway, CO | 1,642 | 20 | 60.0% |
| Ocean Ridge, FL | 1,642 | 41 | 18.0% |
| Patrick AFB, FL | 1,642 | 36 | 28.0% |
| Manito, IL | 1,642 | 41 | 18.0% |
| Weston, OH | 1,642 | 40 | 20.0% |
| Brackettville, TX | 1,642 | 25 | 50.0% |
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