| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 63°F | 50°F | 8.8" |
| February | 44°F | 69°F | 55°F | 2.4" |
| March | 50°F | 73°F | 60°F | 7.4" |
| April | 57°F | 81°F | 68°F | 6.4" |
| May | 63°F | 85°F | 73°F | 12.0" |
| June | 72°F | 93°F | 82°F | 5.7" |
| July | 74°F | 96°F | 84°F | 2.8" |
| August | 74°F | 97°F | 85°F | 12.7" |
| September | 70°F | 93°F | 81°F | 6.1" |
| October | 60°F | 84°F | 71°F | 5.6" |
| November | 50°F | 71°F | 59°F | 7.9" |
| December | 43°F | 63°F | 52°F | 6.6" |
| Index | Thorndale | Texas | National |
| Air quality index | 44 | 52 | 42 |
| Pollution index | 692,760 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 249 |
| Days with moderate air quality | 114 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bartlett, TX | 1,703 | 42 | 16.0% |
| Granger, TX | 1,189 | 42 | 16.0% |
| Thrall, TX | 734 | 44 | 12.0% |
| Coupland, TX | 388 | 44 | 12.0% |
| Lexington, TX | 1,290 | 44 | 12.0% |
| Thorndale, TX | 1,350 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Guthrie, KY | 1,350 | 40 | 20.0% |
| Minneota, MN | 1,350 | 32 | 36.0% |
| Olivet, NJ | 1,350 | 40 | 20.0% |
| Saint-Hubert-de-Rivière-du-Loup, QC | 1,350 | n/a | |
| Les Éboulements, QC | 1,350 | n/a | |
| Thorndale, TX | 1,350 | 44 | 12.0% |