| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 58°F | 45°F | 5.9" |
| February | 39°F | 61°F | 49°F | 5.6" |
| March | 47°F | 70°F | 57°F | 8.2" |
| April | 54°F | 77°F | 64°F | 8.9" |
| May | 61°F | 83°F | 71°F | 6.0" |
| June | 70°F | 91°F | 79°F | 6.0" |
| July | 72°F | 94°F | 82°F | 3.4" |
| August | 72°F | 94°F | 82°F | 10.4" |
| September | 65°F | 88°F | 76°F | 14.7" |
| October | 53°F | 79°F | 65°F | 15.7" |
| November | 45°F | 68°F | 55°F | 8.1" |
| December | 38°F | 59°F | 47°F | 10.1" |
| Index | Winfield | Texas | National |
| Air quality index | 37 | 52 | 42 |
| Pollution index | 2,304,530 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 289 |
| Days with moderate air quality | 67 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.900% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.040% |
| Mercury | 1.100% |
| City | Population | Air Quality Index | National Avg. |
| Miller's Cove, TX | 143 | 37 | 26.0% |
| Rocky Mound, TX | 107 | 37 | 26.0% |
| Mount Vernon, TX | 2,780 | 37 | 26.0% |
| Mount Pleasant, TX | 17,058 | 37 | 26.0% |
| Winnsboro, TX | 3,330 | 37 | 26.0% |
| Winfield, TX | 533 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Williamsburg, CO | 533 | 16 | 68.0% |
| Paradise Heights, FL | 533 | 39 | 22.0% |
| Mansfield, GA | 533 | 44 | 12.0% |
| Chicopee, KS | 533 | 37 | 26.0% |
| Kanopolis, KS | 533 | 40 | 20.0% |
| Winfield, TX | 533 | 37 | 26.0% |
Here are the best places to live in Texas
Check out the 10 safest cities in Texas
Safest States In The US
Check out the 10 most dangerous cities in Texas