| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 62°F | 49°F | 8.0" |
| February | 43°F | 67°F | 53°F | 3.9" |
| March | 50°F | 74°F | 61°F | 8.5" |
| April | 58°F | 80°F | 68°F | 6.8" |
| May | 65°F | 86°F | 75°F | 10.2" |
| June | 72°F | 93°F | 83°F | 10.1" |
| July | 75°F | 95°F | 85°F | 15.2" |
| August | 74°F | 97°F | 85°F | 11.2" |
| September | 68°F | 90°F | 79°F | 6.6" |
| October | 58°F | 82°F | 70°F | 2.8" |
| November | 49°F | 71°F | 59°F | 5.0" |
| December | 41°F | 63°F | 51°F | 4.3" |
| Index | Brushy Creek | Texas | National |
| Air quality index | 44 | 52 | 50 |
| Pollution index | 1,922,400 | 4,642,916 | 5,066,862 |
| 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 | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Serenada, TX | 1,443 | 42 | 16% |
| Cedar Park, TX | 63,551 | 44 | 12% |
| Jonestown, TX | 1,740 | 44 | 12% |
| Volente, TX | 701 | 44 | 12% |
| Weir, TX | 404 | 44 | 12% |
| Brushy Creek, TX | 21,780 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Duarte, CA | 21,792 | 72 | 44% |
| Oakdale, CA | 21,796 | 49 | 2% |
| Christiansburg, VA | 21,799 | 41 | 18% |
| Clarksville, IN | 21,812 | 49 | 2% |
| Chillicothe, OH | 21,748 | 38 | 24% |
| Brushy Creek, TX | 21,780 | 44 | 12% |
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