| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 54°F | 37°F | 2.8" |
| February | 27°F | 59°F | 41°F | 1.5" |
| March | 35°F | 69°F | 50°F | 4.5" |
| April | 41°F | 75°F | 57°F | 2.1" |
| May | 50°F | 82°F | 65°F | 6.1" |
| June | 61°F | 91°F | 75°F | 6.9" |
| July | 64°F | 91°F | 77°F | 4.5" |
| August | 63°F | 90°F | 75°F | 6.2" |
| September | 56°F | 83°F | 68°F | 3.8" |
| October | 45°F | 75°F | 58°F | 4.6" |
| November | 33°F | 64°F | 47°F | 0.8" |
| December | 26°F | 53°F | 37°F | 2.3" |
| Index | Farwell | Texas | National |
| Air quality index | 25 | 52 | 42 |
| Pollution index | 867,559 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 330 |
| Days with good air quality | 316 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Texico, NM | 1,053 | 25 | 50.0% |
| Clovis, NM | 38,701 | 25 | 50.0% |
| Bovina, TX | 1,315 | 44 | 12.0% |
| Farwell, TX | 1,535 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Decatur, AR | 1,536 | 44 | 12.0% |
| London, CA | 1,534 | 66 | 32.0% |
| Bokeelia, FL | 1,536 | 36 | 28.0% |
| McCaysville, GA | 1,536 | 1 | 98.0% |
| Alton, IA | 1,534 | 35 | 30.0% |
| Farwell, TX | 1,535 | 25 | 50.0% |
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