| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 57°F | 45°F | 2.3" |
| February | 39°F | 61°F | 48°F | 1.6" |
| March | 47°F | 69°F | 57°F | 1.7" |
| April | 55°F | 77°F | 65°F | 3.7" |
| May | 62°F | 83°F | 72°F | 3.2" |
| June | 71°F | 91°F | 80°F | 2.8" |
| July | 74°F | 95°F | 83°F | 1.2" |
| August | 74°F | 96°F | 84°F | 2.0" |
| September | 66°F | 89°F | 76°F | 1.0" |
| October | 55°F | 79°F | 65°F | 2.9" |
| November | 46°F | 68°F | 56°F | 2.1" |
| December | 38°F | 58°F | 47°F | 2.4" |
| Index | Greenville | Texas | National |
| Air quality index | 51 | 52 | 42 |
| Pollution index | 37,723,200 | 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 | 0.060% |
| Benzene | 0.290% |
| Carbon Tetrachloride | 0.220% |
| Lead | 0.230% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Celeste, TX | 1,124 | 51 | 2.0% |
| Lone Oak, TX | 631 | 51 | 2.0% |
| Union Valley, TX | 528 | 51 | 2.0% |
| Farmersville, TX | 3,560 | 51 | 2.0% |
| Caddo Mills, TX | 1,666 | 51 | 2.0% |
| Greenville, TX | 28,088 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Burlington, MA | 28,077 | 43 | 14.0% |
| Immokalee, FL | 28,060 | 34 | 32.0% |
| Independence, KY | 28,119 | 54 | 8.0% |
| Saratoga Springs, NY | 28,056 | 37 | 26.0% |
| Hobart, IN | 28,120 | 37 | 26.0% |
| Greenville, TX | 28,088 | 51 | 2.0% |
Here are the best places to live in Texas
Most Dangerous States In The US
Check out the 10 safest cities in Texas
See the best places to live in Greenville