| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 71°F | 55°F | 2.4" |
| February | 50°F | 76°F | 61°F | 2.9" |
| March | 57°F | 80°F | 67°F | 5.8" |
| April | 64°F | 87°F | 74°F | 4.0" |
| May | 68°F | 90°F | 78°F | 6.0" |
| June | 74°F | 96°F | 83°F | 6.3" |
| July | 74°F | 98°F | 84°F | 5.4" |
| August | 75°F | 100°F | 85°F | 10.2" |
| September | 72°F | 95°F | 82°F | 5.8" |
| October | 64°F | 89°F | 75°F | 4.6" |
| November | 56°F | 79°F | 66°F | 2.7" |
| December | 50°F | 73°F | 60°F | 1.6" |
| Index | Westdale | 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. |
| South La Paloma, TX | 389 | 30 | 40.0% |
| Loma Linda East CDP (Starr County), TX | 0 | 30 | 40.0% |
| K-Bar Ranch, TX | 362 | 30 | 40.0% |
| Orange Grove, TX | 1,370 | 30 | 40.0% |
| Alfred, TX | 90 | 30 | 40.0% |
| Westdale, TX | 93 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Diomede, AK | 93 | 38 | 24.0% |
| Sun Valley, AZ | 93 | 44 | 12.0% |
| Glasgow, IL | 93 | 40 | 20.0% |
| Sims, IN | 93 | 37 | 26.0% |
| Highland Beach, MD | 93 | 46 | 8.0% |
| Westdale, TX | 93 | 30 | 40.0% |
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