| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 65°F | 49°F | 0.8" |
| February | 41°F | 72°F | 55°F | 0.5" |
| March | 50°F | 80°F | 63°F | 0.7" |
| April | 58°F | 87°F | 71°F | 0.5" |
| May | 65°F | 92°F | 77°F | 1.3" |
| June | 72°F | 97°F | 84°F | 1.2" |
| July | 74°F | 96°F | 84°F | 1.8" |
| August | 74°F | 98°F | 85°F | 1.0" |
| September | 68°F | 91°F | 78°F | 1.5" |
| October | 58°F | 85°F | 70°F | 0.9" |
| November | 47°F | 73°F | 59°F | 0.2" |
| December | 39°F | 65°F | 50°F | 0.4" |
| Index | Sanderson | Texas | National |
| Air quality index | 28 | 52 | 42 |
| Pollution index | 212,433 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 354 |
| Days with good air quality | 319 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sanderson, TX | 769 | 28 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| Dudleyville, AZ | 769 | 47 | 6.0% |
| Round Rock, AZ | 769 | 49 | 2.0% |
| Howard, CO | 769 | 16 | 68.0% |
| Haviland, KS | 769 | 15 | 70.0% |
| Renova, MS | 769 | 43 | 14.0% |
| Sanderson, TX | 769 | 28 | 44.0% |
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