| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 62°F | 50°F | 3.6" |
| February | 44°F | 66°F | 54°F | 5.0" |
| March | 52°F | 74°F | 61°F | 7.7" |
| April | 58°F | 80°F | 68°F | 4.9" |
| May | 65°F | 85°F | 74°F | 12.2" |
| June | 71°F | 91°F | 80°F | 7.2" |
| July | 73°F | 92°F | 81°F | 6.9" |
| August | 74°F | 94°F | 82°F | 7.8" |
| September | 68°F | 89°F | 77°F | 1.6" |
| October | 58°F | 82°F | 68°F | 15.7" |
| November | 50°F | 72°F | 59°F | 9.0" |
| December | 44°F | 64°F | 53°F | 4.8" |
| Index | Jasper | Texas | National |
| Air quality index | 45 | 52 | 42 |
| Pollution index | 2,736,170 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 234 |
| Days with moderate air quality | 122 |
| Days w/ poor A.Q. for sensitive groups | 8 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Browndell, TX | 131 | 45 | 10.0% |
| Newton, TX | 2,249 | 45 | 10.0% |
| Jasper, TX | 7,556 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| McCook, NE | 7,555 | 19 | 62.0% |
| Corbin, KY | 7,558 | 40 | 20.0% |
| Middletown CDP, PA | 7,558 | 44 | 12.0% |
| Escalon, CA | 7,553 | 49 | 2.0% |
| Hartsville, SC | 7,559 | 40 | 20.0% |
| Jasper, TX | 7,556 | 45 | 10.0% |
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