| 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 | Groesbeck | Texas | National |
| Air quality index | 41 | 52 | 42 |
| Pollution index | 1,309,490 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 275 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 3 |
| 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. |
| Thornton, TX | 627 | 38 | 24.0% |
| Tehuacana, TX | 188 | 41 | 18.0% |
| Mexia, TX | 7,319 | 41 | 18.0% |
| Teague, TX | 3,517 | 41 | 18.0% |
| Groesbeck, TX | 4,206 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Lonoke, AR | 4,206 | 45 | 10.0% |
| Elmira Heights, NY | 4,206 | 35 | 30.0% |
| Shallotte, NC | 4,205 | 34 | 32.0% |
| Perth South, ON | 4,205 | n/a | |
| Vermilion, AB | 4,205 | n/a | |
| Groesbeck, TX | 4,206 | 41 | 18.0% |
Here are the best places to live in Texas
Check out the 10 safest cities in Texas
These are the 10 most affordable cities in Texas
Top 10 cities in Texas with the best education system