| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 62°F | 45°F | 1.1" |
| February | 36°F | 66°F | 49°F | 1.3" |
| March | 44°F | 75°F | 58°F | 1.9" |
| April | 52°F | 82°F | 66°F | 2.2" |
| May | 60°F | 87°F | 72°F | 3.6" |
| June | 69°F | 94°F | 81°F | 3.2" |
| July | 72°F | 96°F | 83°F | 2.5" |
| August | 72°F | 97°F | 83°F | 3.1" |
| September | 64°F | 90°F | 76°F | 2.8" |
| October | 53°F | 82°F | 66°F | 2.6" |
| November | 42°F | 72°F | 56°F | 1.3" |
| December | 33°F | 62°F | 46°F | 1.2" |
| Index | Potosi | Texas | National |
| Air quality index | 33 | 52 | 42 |
| Pollution index | 2,550,610 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 329 |
| Days with moderate air quality | 33 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Clyde, TX | 3,828 | 33 | 34.0% |
| Buffalo Gap, TX | 609 | 33 | 34.0% |
| Impact, TX | 41 | 33 | 34.0% |
| Tye, TX | 1,090 | 33 | 34.0% |
| Lawn, TX | 329 | 33 | 34.0% |
| Potosi, TX | 3,928 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Skippack, PA | 3,928 | 51 | 2.0% |
| Presidio, TX | 3,928 | 47 | 6.0% |
| Brookmont, MD | 3,925 | 47 | 6.0% |
| Coquille, OR | 3,925 | 19 | 62.0% |
| Broadway, VA | 3,925 | 36 | 28.0% |
| Potosi, TX | 3,928 | 33 | 34.0% |
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