| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 72°F | 58°F | 1.4" |
| February | 52°F | 77°F | 62°F | 1.2" |
| March | 58°F | 82°F | 68°F | 3.4" |
| April | 65°F | 89°F | 75°F | 3.2" |
| May | 70°F | 92°F | 80°F | 5.4" |
| June | 74°F | 96°F | 84°F | 2.1" |
| July | 74°F | 97°F | 84°F | 6.2" |
| August | 74°F | 98°F | 84°F | 2.1" |
| September | 71°F | 93°F | 80°F | 9.5" |
| October | 64°F | 88°F | 75°F | 1.3" |
| November | 57°F | 80°F | 67°F | 3.0" |
| December | 51°F | 73°F | 60°F | 1.5" |
| Index | Premont | Texas | National |
| Air quality index | 30 | 52 | 42 |
| Pollution index | 1,808,440 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 284 |
| Days with good air quality | 234 |
| Days with moderate air quality | 50 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cantu Addition, TX | 0 | 30 | 40.0% |
| Falfurrias, TX | 4,435 | 30 | 40.0% |
| Concepcion, TX | 44 | 30 | 40.0% |
| Flowella, TX | 21 | 30 | 40.0% |
| Airport Road Addition, TX | 246 | 30 | 40.0% |
| Premont, TX | 2,564 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Petersburg, IL | 2,564 | 40 | 20.0% |
| Fobes Hill, WA | 2,564 | 45 | 10.0% |
| Cape Neddick, ME | 2,563 | 40 | 20.0% |
| Glenwood, MN | 2,563 | 32 | 36.0% |
| Pembroke, GA | 2,565 | 39 | 22.0% |
| Premont, TX | 2,564 | 30 | 40.0% |
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