| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 69°F | 57°F | 4.1" |
| February | 51°F | 74°F | 61°F | 0.8" |
| March | 58°F | 79°F | 67°F | 1.5" |
| April | 65°F | 85°F | 74°F | 2.7" |
| May | 71°F | 89°F | 79°F | 3.6" |
| June | 75°F | 94°F | 83°F | 2.9" |
| July | 76°F | 94°F | 84°F | 4.6" |
| August | 77°F | 97°F | 86°F | 2.6" |
| September | 73°F | 92°F | 82°F | 3.4" |
| October | 65°F | 87°F | 75°F | 1.6" |
| November | 57°F | 79°F | 67°F | 1.9" |
| December | 51°F | 71°F | 60°F | 1.4" |
| Index | Robstown | 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. |
| Banquete, TX | 520 | 30 | 40.0% |
| North San Pedro, TX | 441 | 30 | 40.0% |
| Tierra Grande, TX | 281 | 30 | 40.0% |
| Bishop, TX | 3,085 | 30 | 40.0% |
| Petronila, TX | 89 | 30 | 40.0% |
| Robstown, TX | 11,214 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Snyder, TX | 11,211 | 25 | 50.0% |
| Grand Rapids, MN | 11,218 | 29 | 42.0% |
| Ridgefield, NJ | 11,209 | 51 | 2.0% |
| Fulton, NY | 11,209 | 37 | 26.0% |
| Greensburg, IN | 11,221 | 41 | 18.0% |
| Robstown, TX | 11,214 | 30 | 40.0% |
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