| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 50°F | 73°F | 60°F | 1.3" |
| February | 54°F | 77°F | 64°F | 0.8" |
| March | 60°F | 82°F | 69°F | 1.3" |
| April | 66°F | 88°F | 76°F | 1.4" |
| May | 71°F | 91°F | 80°F | 2.9" |
| June | 74°F | 95°F | 84°F | 1.7" |
| July | 76°F | 96°F | 84°F | 3.1" |
| August | 76°F | 97°F | 85°F | 2.2" |
| September | 73°F | 93°F | 81°F | 5.4" |
| October | 66°F | 89°F | 76°F | 2.1" |
| November | 58°F | 81°F | 68°F | 2.1" |
| December | 53°F | 74°F | 62°F | 1.6" |
| Index | Yznaga | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 7,136,530 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 243 |
| Days with moderate air quality | 120 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Santa Rosa, TX | 2,745 | 42 | 16.0% |
| Donna, TX | 16,381 | 42 | 16.0% |
| Llano Grande, TX | 2,023 | 42 | 16.0% |
| Scissors, TX | 3,511 | 42 | 16.0% |
| Ranchette Estates, TX | 237 | 42 | 16.0% |
| Yznaga, TX | 56 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Hughes, AK | 56 | 38 | 24.0% |
| Northway Junction, AK | 56 | 38 | 24.0% |
| Shageluk, AK | 56 | 31 | 38.0% |
| Beedeville, AR | 56 | 45 | 10.0% |
| Aspen Springs, CA | 56 | 47 | 6.0% |
| Yznaga, TX | 56 | 42 | 16.0% |
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