| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 70°F | 56°F | 0.9" |
| February | 51°F | 75°F | 61°F | 2.2" |
| March | 58°F | 82°F | 68°F | 8.8" |
| April | 64°F | 88°F | 74°F | 9.8" |
| May | 69°F | 91°F | 78°F | 4.4" |
| June | 73°F | 96°F | 83°F | 6.0" |
| July | 74°F | 96°F | 84°F | 4.4" |
| August | 74°F | 98°F | 85°F | 6.8" |
| September | 71°F | 92°F | 80°F | 8.2" |
| October | 63°F | 87°F | 74°F | 4.2" |
| November | 55°F | 78°F | 65°F | 3.1" |
| December | 49°F | 70°F | 58°F | 3.7" |
| Index | Hebbronville | Texas | National |
| Air quality index | 41 | 52 | 42 |
| Pollution index | 2,768,160 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 258 |
| Days with moderate air quality | 106 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Realitos, TX | 113 | 30 | 40.0% |
| Las Lomitas, TX | 64 | 30 | 40.0% |
| South Fork Estates, TX | 60 | 41 | 18.0% |
| Bruni, TX | 383 | 41 | 18.0% |
| Hebbronville, TX | 4,730 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Jackson, AL | 4,731 | 42 | 16.0% |
| Santa Ynez, CA | 4,728 | 44 | 12.0% |
| Hummelstown, PA | 4,732 | 44 | 12.0% |
| Rocky Mount, VA | 4,727 | 38 | 24.0% |
| Crystal City, MO | 4,733 | 54 | 8.0% |
| Hebbronville, TX | 4,730 | 41 | 18.0% |
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