| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 68°F | 53°F | 2.7" |
| February | 44°F | 72°F | 57°F | 1.7" |
| March | 51°F | 78°F | 64°F | 2.7" |
| April | 58°F | 84°F | 70°F | 2.8" |
| May | 65°F | 89°F | 76°F | 5.2" |
| June | 73°F | 94°F | 83°F | 2.7" |
| July | 75°F | 96°F | 84°F | 2.6" |
| August | 76°F | 98°F | 85°F | 2.5" |
| September | 70°F | 93°F | 80°F | 4.7" |
| October | 60°F | 85°F | 72°F | 3.1" |
| November | 51°F | 76°F | 63°F | 1.8" |
| December | 43°F | 68°F | 54°F | 2.0" |
| Index | Bulverde | Texas | National |
| Air quality index | 49 | 52 | 42 |
| Pollution index | 24,182,700 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 196 |
| Days with moderate air quality | 163 |
| Days w/ poor A.Q. for sensitive groups | 5 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.310% |
| Benzene | 0.310% |
| Carbon Tetrachloride | 0.080% |
| Lead | 0.140% |
| Mercury | 0.230% |
| City | Population | Air Quality Index | National Avg. |
| Timberwood Park, TX | 25,003 | 49 | 2.0% |
| Shavano Park, TX | 3,874 | 49 | 2.0% |
| Grey Forest, TX | 503 | 49 | 2.0% |
| Cross Mountain, TX | 3,238 | 49 | 2.0% |
| Canyon Lake, TX | 26,338 | 49 | 2.0% |
| Bulverde, TX | 5,279 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Offutt AFB, NE | 5,280 | 40 | 20.0% |
| Calverton, NY | 5,280 | 41 | 18.0% |
| Fruitland, MD | 5,281 | 36 | 28.0% |
| Buellton, CA | 5,276 | 44 | 12.0% |
| Bulkley-Nechako A, BC | 5,276 | n/a | |
| Bulverde, TX | 5,279 | 49 | 2.0% |
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