| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 63°F | 50°F | 13.6" |
| February | 46°F | 68°F | 54°F | 5.8" |
| March | 53°F | 76°F | 62°F | 21.8" |
| April | 56°F | 80°F | 66°F | 3.5" |
| May | 65°F | 85°F | 74°F | 6.4" |
| June | 71°F | 92°F | 80°F | 5.9" |
| July | 73°F | 93°F | 81°F | 14.0" |
| August | 73°F | 96°F | 83°F | 16.2" |
| September | 70°F | 95°F | 80°F | 5.7" |
| October | 58°F | 86°F | 70°F | 3.4" |
| November | 52°F | 77°F | 62°F | 5.4" |
| December | 41°F | 69°F | 53°F | 1.5" |
| Index | Wimberley | Texas | National |
| Air quality index | 44 | 52 | 42 |
| Pollution index | 1,877,920 | 2,009,300 | 2,726,193 |
| 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 | 0.001% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Martindale, TX | 1,059 | 44 | 12.0% |
| Mountain City, TX | 536 | 44 | 12.0% |
| Driftwood, TX | 131 | 44 | 12.0% |
| Redwood, TX | 3,349 | 44 | 12.0% |
| San Marcos, TX | 64,053 | 44 | 12.0% |
| Wimberley, TX | 3,168 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Galena, IL | 3,168 | 29 | 42.0% |
| Homestead, PA | 3,168 | 56 | 12.0% |
| Liberty, SC | 3,168 | 41 | 18.0% |
| Netcong, NJ | 3,167 | 34 | 32.0% |
| Cadiz, OH | 3,169 | 39 | 22.0% |
| Wimberley, TX | 3,168 | 44 | 12.0% |
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