| 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 | Silverton | Texas | National |
| Air quality index | 44 | 52 | 42 |
| Pollution index | 89,648 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 259 |
| Days with moderate air quality | 96 |
| Days w/ poor A.Q. for sensitive groups | 10 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Quitaque, TX | 325 | 44 | 12.0% |
| Silverton, TX | 730 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Brenda, AZ | 730 | 13 | 74.0% |
| Antonito, CO | 730 | 15 | 70.0% |
| Carson, IA | 730 | 40 | 20.0% |
| Reddell, LA | 730 | 41 | 18.0% |
| Ohio City, OH | 730 | 39 | 22.0% |
| Silverton, TX | 730 | 44 | 12.0% |
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