| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 62°F | 50°F | 3.1" |
| February | 44°F | 68°F | 55°F | 1.6" |
| March | 51°F | 74°F | 62°F | 5.0" |
| April | 59°F | 81°F | 69°F | 3.3" |
| May | 65°F | 86°F | 75°F | 5.5" |
| June | 73°F | 94°F | 83°F | 2.9" |
| July | 76°F | 96°F | 85°F | 1.9" |
| August | 76°F | 98°F | 87°F | 1.5" |
| September | 70°F | 92°F | 80°F | 3.6" |
| October | 60°F | 83°F | 70°F | 4.3" |
| November | 50°F | 72°F | 60°F | 1.4" |
| December | 42°F | 64°F | 51°F | 1.8" |
| Index | Gatesville | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 4,190,870 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 284 |
| Days with moderate air quality | 79 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Oglesby, TX | 606 | 38 | 24.0% |
| South Mountain, TX | 441 | 42 | 16.0% |
| Gatesville, TX | 13,513 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Soddy-Daisy, TN | 13,510 | 46 | 8.0% |
| Brecksville, OH | 13,521 | 50 | = 100 |
| Sault Ste. Marie, MI | 13,526 | 32 | 36.0% |
| Huntington, VA | 13,526 | 47 | 6.0% |
| St. James, NY | 13,533 | 43 | 14.0% |
| Gatesville, TX | 13,513 | 42 | 16.0% |
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