| 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 | Eagle Lake | 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. |
| Columbus, TX | 3,645 | 31 | 38.0% |
| Hungerford, TX | 88 | 52 | 4.0% |
| San Felipe, TX | 1,108 | 52 | 4.0% |
| Sealy, TX | 6,439 | 52 | 4.0% |
| Eagle Lake, TX | 3,742 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Lac-Etchemin, QC | 3,742 | n/a | |
| Mabank, TX | 3,743 | 41 | 18.0% |
| Eastover, NC | 3,740 | 41 | 18.0% |
| Indian Head Park, IL | 3,744 | 55 | 10.0% |
| Forestdale, MA | 3,744 | 36 | 28.0% |
| Eagle Lake, TX | 3,742 | 52 | 4.0% |
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