| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 70°F | 55°F | 1.2" |
| February | 48°F | 75°F | 60°F | 1.0" |
| March | 55°F | 82°F | 67°F | 1.7" |
| April | 62°F | 88°F | 74°F | 1.7" |
| May | 68°F | 93°F | 79°F | 3.3" |
| June | 73°F | 98°F | 85°F | 1.8" |
| July | 75°F | 99°F | 86°F | 3.2" |
| August | 75°F | 101°F | 87°F | 1.5" |
| September | 71°F | 95°F | 82°F | 3.2" |
| October | 63°F | 88°F | 74°F | 2.0" |
| November | 54°F | 79°F | 65°F | 0.7" |
| December | 46°F | 69°F | 56°F | 1.4" |
| Index | Pearsall | Texas | National |
| Air quality index | 49 | 52 | 42 |
| Pollution index | 233,769 | 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 | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bigfoot, TX | 685 | 49 | 2.0% |
| North Pearsall, TX | 480 | 49 | 2.0% |
| Hilltop, TX | 196 | 49 | 2.0% |
| Hilltop CDP (Starr County), TX | 52 | 49 | 2.0% |
| Moore, TX | 279 | 49 | 2.0% |
| Pearsall, TX | 11,243 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Hudson, FL | 11,243 | 43 | 14.0% |
| Camp Verde, AZ | 11,241 | 43 | 14.0% |
| Burkburnett, TX | 11,241 | 26 | 48.0% |
| Selma, TX | 11,241 | 49 | 2.0% |
| Travilah, MD | 11,239 | 47 | 6.0% |
| Pearsall, TX | 11,243 | 49 | 2.0% |
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