| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 58°F | 44°F | 2.9" |
| February | 38°F | 61°F | 48°F | 1.9" |
| March | 47°F | 70°F | 57°F | 3.9" |
| April | 54°F | 77°F | 65°F | 4.2" |
| May | 62°F | 83°F | 72°F | 4.7" |
| June | 71°F | 92°F | 81°F | 3.4" |
| July | 73°F | 96°F | 84°F | 2.7" |
| August | 74°F | 96°F | 84°F | 2.1" |
| September | 66°F | 90°F | 77°F | 2.9" |
| October | 54°F | 80°F | 66°F | 4.6" |
| November | 45°F | 68°F | 56°F | 3.5" |
| December | 36°F | 58°F | 46°F | 3.1" |
| Index | Anna | Texas | National |
| Air quality index | 51 | 52 | 42 |
| Pollution index | 723,856 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 181 |
| Days with moderate air quality | 155 |
| Days w/ poor A.Q. for sensitive groups | 28 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Celina, TX | 13,608 | 51 | 2.0% |
| Lowry Crossing, TX | 1,205 | 51 | 2.0% |
| Weston, TX | 233 | 51 | 2.0% |
| Melissa, TX | 10,774 | 51 | 2.0% |
| McKinney, TX | 191,197 | 51 | 2.0% |
| Anna, TX | 14,159 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Greendale, WI | 14,160 | 44 | 12.0% |
| Williamstown, NJ | 14,161 | 40 | 20.0% |
| Weigelstown, PA | 14,156 | 41 | 18.0% |
| Washington Court House, OH | 14,155 | 38 | 24.0% |
| Broadlands, VA | 14,146 | 47 | 6.0% |
| Anna, TX | 14,159 | 51 | 2.0% |
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