| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 59°F | 44°F | 5.4" |
| February | 37°F | 64°F | 49°F | 3.4" |
| March | 46°F | 74°F | 58°F | 5.3" |
| April | 54°F | 81°F | 66°F | 6.6" |
| May | 61°F | 86°F | 73°F | 8.7" |
| June | 70°F | 94°F | 82°F | 7.5" |
| July | 73°F | 96°F | 84°F | 9.5" |
| August | 73°F | 96°F | 84°F | 8.0" |
| September | 65°F | 88°F | 76°F | 10.5" |
| October | 54°F | 80°F | 66°F | 12.2" |
| November | 44°F | 69°F | 55°F | 5.5" |
| December | 35°F | 59°F | 45°F | 4.6" |
| Index | Stamford | Texas | National |
| Air quality index | 26 | 52 | 42 |
| Pollution index | 122,809 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 345 |
| Days with good air quality | 308 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Anson, TX | 1,884 | 26 | 48.0% |
| Lueders, TX | 238 | 26 | 48.0% |
| Haskell, TX | 3,194 | 26 | 48.0% |
| Stamford, TX | 2,898 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Onalaska, TX | 2,898 | 52 | 4.0% |
| Northwest Harwinton, CT | 2,897 | 37 | 26.0% |
| Shenandoah, VA | 2,897 | 36 | 28.0% |
| Tangelo Park, FL | 2,899 | 39 | 22.0% |
| Poplarville, MS | 2,899 | 35 | 30.0% |
| Stamford, TX | 2,898 | 26 | 48.0% |
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