| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 56°F | 43°F | 1.9" |
| February | 36°F | 60°F | 46°F | 1.8" |
| March | 46°F | 69°F | 56°F | 2.7" |
| April | 53°F | 76°F | 63°F | 3.4" |
| May | 61°F | 82°F | 71°F | 6.0" |
| June | 70°F | 91°F | 80°F | 3.8" |
| July | 73°F | 95°F | 83°F | 2.9" |
| August | 73°F | 96°F | 84°F | 2.2" |
| September | 65°F | 88°F | 76°F | 1.7" |
| October | 54°F | 78°F | 65°F | 2.2" |
| November | 44°F | 67°F | 54°F | 2.1" |
| December | 35°F | 56°F | 44°F | 2.2" |
| Index | Tioga | Texas | National |
| Air quality index | 325 | 52 | 42 |
| Pollution index | 8,884,190 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 138 |
| Days with good air quality | 120 |
| Days with moderate air quality | 17 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.260% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Lake Kiowa, TX | 2,418 | 43 | 14.0% |
| Valley View, TX | 794 | 43 | 14.0% |
| Gainesville, TX | 16,557 | 43 | 14.0% |
| Celina, TX | 13,608 | 51 | 2.0% |
| Sanger, TX | 8,535 | 51 | 2.0% |
| Tioga, TX | 958 | 325 | 550.0% |
| City | Population | Air Quality Index | National Avg. |
| Hackett, AR | 958 | 36 | 28.0% |
| Chumuckla, FL | 958 | 41 | 18.0% |
| Van Horne, IA | 958 | 39 | 22.0% |
| Bellefonte, KY | 958 | 42 | 16.0% |
| Farmersville, PA | 958 | 45 | 10.0% |
| Tioga, TX | 958 | 325 | 550.0% |
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