| 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 | Thornton | 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. |
| Kosse, TX | 770 | 38 | 24.0% |
| Groesbeck, TX | 4,206 | 41 | 18.0% |
| Thornton, TX | 627 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Big Delta, AK | 627 | 38 | 24.0% |
| Pavo, GA | 627 | 35 | 30.0% |
| Fern Forest, HI | 627 | 16 | 68.0% |
| Lime Springs, IA | 627 | 36 | 28.0% |
| Stanton, IA | 627 | 40 | 20.0% |
| Thornton, TX | 627 | 38 | 24.0% |
Here are the best places to live in Texas
Safest States In The US
See the best places to live in Thornton
Check out the 10 most dangerous cities in Texas