| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 58°F | 44°F | 2.2" |
| February | 37°F | 62°F | 48°F | 1.9" |
| March | 47°F | 71°F | 58°F | 3.6" |
| April | 54°F | 78°F | 65°F | 4.0" |
| May | 61°F | 84°F | 72°F | 4.9" |
| June | 71°F | 93°F | 82°F | 4.4" |
| July | 74°F | 96°F | 85°F | 2.1" |
| August | 74°F | 97°F | 85°F | 2.2" |
| September | 66°F | 90°F | 77°F | 2.6" |
| October | 54°F | 80°F | 66°F | 3.9" |
| November | 45°F | 69°F | 56°F | 2.4" |
| December | 35°F | 58°F | 46°F | 2.3" |
| Index | Denton | Texas | National |
| Air quality index | 51 | 52 | 42 |
| Pollution index | 967,579 | 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 | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Krum, TX | 5,088 | 51 | 2.0% |
| Corinth, TX | 21,881 | 51 | 2.0% |
| Flower Mound, TX | 78,854 | 51 | 2.0% |
| Lake Dallas, TX | 8,004 | 51 | 2.0% |
| Northlake, TX | 3,182 | 51 | 2.0% |
| Denton, TX | 139,734 | 51 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Orange, CA | 139,322 | 89 | 78.0% |
| Cambridge, ON | 140,221 | n/a | |
| Olathe, KS | 139,216 | 47 | 6.0% |
| Dayton, OH | 140,444 | 47 | 6.0% |
| Surprise, AZ | 139,007 | 74 | 48.0% |
| Denton, TX | 139,734 | 51 | 2.0% |
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