| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 51°F | 72°F | 60°F | 2.9" |
| February | 55°F | 77°F | 64°F | 2.4" |
| March | 61°F | 82°F | 70°F | 4.1" |
| April | 67°F | 88°F | 76°F | 4.4" |
| May | 72°F | 91°F | 80°F | 7.5" |
| June | 76°F | 96°F | 84°F | 6.0" |
| July | 76°F | 96°F | 85°F | 12.6" |
| August | 77°F | 97°F | 86°F | 6.9" |
| September | 74°F | 93°F | 81°F | 9.5" |
| October | 67°F | 89°F | 77°F | 11.2" |
| November | 59°F | 81°F | 69°F | 4.4" |
| December | 54°F | 74°F | 62°F | 4.7" |
| Index | Elsa | 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. |
| Campo Verde, TX | 169 | 42 | 16.0% |
| Santa Rosa CDP, TX | 212 | 42 | 16.0% |
| Relampago, TX | 387 | 42 | 16.0% |
| Donna, TX | 16,381 | 42 | 16.0% |
| Llano Grande, TX | 2,023 | 42 | 16.0% |
| Elsa, TX | 7,181 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Chelsea, QC | 7,181 | n/a | |
| Augusta, ON | 7,178 | n/a | |
| Sausalito, CA | 7,177 | 40 | 20.0% |
| Kingsland, TX | 7,177 | 44 | 12.0% |
| Camden, SC | 7,185 | 43 | 14.0% |
| Elsa, TX | 7,181 | 42 | 16.0% |
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