| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | n/a°F | n/a°F | n/a°F | n/a |
| February | n/a°F | n/a°F | n/a°F | n/a |
| March | n/a°F | n/a°F | n/a°F | n/a |
| April | n/a°F | n/a°F | n/a°F | n/a |
| May | n/a°F | n/a°F | n/a°F | n/a |
| June | n/a°F | n/a°F | n/a°F | n/a |
| July | n/a°F | n/a°F | n/a°F | n/a |
| August | n/a°F | n/a°F | n/a°F | n/a |
| September | n/a°F | n/a°F | n/a°F | n/a |
| October | n/a°F | n/a°F | n/a°F | n/a |
| November | n/a°F | n/a°F | n/a°F | n/a |
| December | n/a°F | n/a°F | n/a°F | n/a |
| Index | O'Brien | Texas | National |
| Air quality index | 26 | 52 | 42 |
| Pollution index | 122,809 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 345 |
| Days with good air quality | 308 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Benjamin, TX | 245 | 26 | 48.0% |
| Rule, TX | 709 | 26 | 48.0% |
| Rochester, TX | 347 | 26 | 48.0% |
| Knox City, TX | 1,127 | 26 | 48.0% |
| Weinert, TX | 223 | 26 | 48.0% |
| O'Brien, TX | 123 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Haleburg, AL | 123 | 35 | 30.0% |
| Katherine, AZ | 123 | 13 | 74.0% |
| Nunez, GA | 123 | 47 | 6.0% |
| Cylinder, IA | 123 | 15 | 70.0% |
| Golden Gate, IL | 123 | 43 | 14.0% |
| O'Brien, TX | 123 | 26 | 48.0% |