| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 65°F | 53°F | 1.5" |
| February | 48°F | 69°F | 57°F | 1.3" |
| March | 54°F | 75°F | 64°F | 1.9" |
| April | 61°F | 81°F | 70°F | 2.2" |
| May | 67°F | 87°F | 76°F | 2.9" |
| June | 72°F | 92°F | 81°F | 3.0" |
| July | 74°F | 94°F | 82°F | 4.0" |
| August | 74°F | 95°F | 83°F | 4.7" |
| September | 70°F | 91°F | 79°F | 4.0" |
| October | 60°F | 85°F | 71°F | 2.4" |
| November | 53°F | 75°F | 62°F | 1.9" |
| December | 47°F | 67°F | 56°F | 2.8" |
| Index | Wharton | Texas | National |
| Air quality index | 52 | 52 | 42 |
| Pollution index | 1,269,560 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 171 |
| Days with moderate air quality | 163 |
| Days w/ poor A.Q. for sensitive groups | 26 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| El Campo, TX | 11,695 | 31 | 38.0% |
| East Bernard, TX | 2,323 | 52 | 4.0% |
| Hungerford, TX | 88 | 52 | 4.0% |
| Beasley, TX | 992 | 52 | 4.0% |
| Iago, TX | 96 | 52 | 4.0% |
| Wharton, TX | 8,654 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Des Peres, MO | 8,654 | 54 | 8.0% |
| Plymouth, WI | 8,654 | 38 | 24.0% |
| Edgemere, MD | 8,652 | 46 | 8.0% |
| South Bruce Peninsula, ON | 8,652 | n/a | |
| Audubon, NJ | 8,656 | 51 | 2.0% |
| Wharton, TX | 8,654 | 52 | 4.0% |
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