| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 55°F | 38°F | 2.3" |
| February | 29°F | 60°F | 42°F | 1.0" |
| March | 37°F | 71°F | 52°F | 4.5" |
| April | 44°F | 77°F | 59°F | 2.1" |
| May | 53°F | 82°F | 66°F | 2.1" |
| June | 63°F | 91°F | 77°F | 3.2" |
| July | 65°F | 91°F | 78°F | 4.8" |
| August | 64°F | 90°F | 77°F | 3.8" |
| September | 57°F | 83°F | 69°F | 4.9" |
| October | 46°F | 75°F | 59°F | 1.3" |
| November | 35°F | 65°F | 48°F | 2.0" |
| December | 27°F | 54°F | 39°F | 2.0" |
| Index | Amherst | Texas | National |
| Air quality index | 25 | 52 | 42 |
| Pollution index | 1,013,960 | 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 | 0.220% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Sudan, TX | 1,071 | 25 | 50.0% |
| Anton, TX | 1,211 | 25 | 50.0% |
| Littlefield, TX | 5,900 | 25 | 50.0% |
| Spade, TX | 61 | 25 | 50.0% |
| Amherst, TX | 1,050 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Mount Crested Butte, CO | 1,050 | 44 | 12.0% |
| New Castle, KY | 1,050 | 49 | 2.0% |
| Clarence, MO | 1,050 | 41 | 18.0% |
| Bay Head, NJ | 1,050 | 41 | 18.0% |
| South Corning, NY | 1,050 | 35 | 30.0% |
| Amherst, TX | 1,050 | 25 | 50.0% |
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