| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 60°F | 47°F | 6.7" |
| February | 42°F | 66°F | 52°F | 4.8" |
| March | 48°F | 70°F | 58°F | 9.0" |
| April | 56°F | 78°F | 66°F | 9.0" |
| May | 62°F | 82°F | 71°F | 5.9" |
| June | 70°F | 89°F | 79°F | 5.6" |
| July | 73°F | 93°F | 82°F | 4.4" |
| August | 72°F | 95°F | 82°F | 15.0" |
| September | 68°F | 91°F | 79°F | 7.9" |
| October | 58°F | 82°F | 69°F | 15.5" |
| November | 48°F | 69°F | 57°F | 8.2" |
| December | 40°F | 61°F | 50°F | 5.3" |
| Index | Mart | Texas | National |
| Air quality index | 38 | 52 | 42 |
| Pollution index | 1,309,490 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 329 |
| Days with moderate air quality | 36 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.430% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.390% |
| City | Population | Air Quality Index | National Avg. |
| Hallsburg, TX | 405 | 38 | 24.0% |
| Mount Calm, TX | 338 | 38 | 24.0% |
| Riesel, TX | 1,349 | 38 | 24.0% |
| Golinda, TX | 656 | 38 | 24.0% |
| Leroy, TX | 373 | 38 | 24.0% |
| Mart, TX | 1,881 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Gearhart, OR | 1,881 | 18 | 64.0% |
| Seth Ward, TX | 1,881 | 25 | 50.0% |
| Ellaville, GA | 1,880 | 39 | 22.0% |
| Roanoke, IL | 1,880 | 41 | 18.0% |
| Livingston, LA | 1,880 | 30 | 40.0% |
| Mart, TX | 1,881 | 38 | 24.0% |
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