| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 61°F | 47°F | 2.9" |
| February | 39°F | 65°F | 51°F | 2.0" |
| March | 47°F | 73°F | 60°F | 3.3" |
| April | 55°F | 80°F | 67°F | 3.2" |
| May | 63°F | 86°F | 74°F | 4.9" |
| June | 73°F | 95°F | 84°F | 3.7" |
| July | 76°F | 98°F | 86°F | 2.2" |
| August | 76°F | 99°F | 87°F | 2.4" |
| September | 69°F | 92°F | 80°F | 2.8" |
| October | 57°F | 83°F | 69°F | 3.8" |
| November | 47°F | 72°F | 59°F | 2.7" |
| December | 37°F | 62°F | 49°F | 2.5" |
| Index | Coppell | Texas | National |
| Air quality index | 51 | 52 | 42 |
| Pollution index | 1,399,310 | 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 | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Highland Park, TX | 9,143 | 51 | 2.0% |
| North Richland Hills, TX | 70,585 | 51 | 2.0% |
| Bartonville, TX | 1,481 | 51 | 2.0% |
| Double Oak, TX | 3,099 | 51 | 2.0% |
| Lake Dallas, TX | 8,004 | 51 | 2.0% |
| Coppell, TX | 41,494 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Woodlawn, MD | 41,505 | 46 | 8.0% |
| Gainesville, GA | 41,464 | 37 | 26.0% |
| Charlottetown, PE | 41,537 | n/a | |
| Linton Hall, VA | 41,426 | 47 | 6.0% |
| Shakopee, MN | 41,423 | 46 | 8.0% |
| Coppell, TX | 41,494 | 51 | 2.0% |
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