| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 59°F | 41°F | 0.7" |
| February | 33°F | 64°F | 46°F | 0.5" |
| March | 40°F | 74°F | 55°F | 0.3" |
| April | 47°F | 81°F | 63°F | 0.9" |
| May | 56°F | 87°F | 71°F | 1.7" |
| June | 66°F | 96°F | 80°F | 1.6" |
| July | 68°F | 95°F | 81°F | 2.0" |
| August | 67°F | 94°F | 80°F | 2.0" |
| September | 61°F | 87°F | 72°F | 2.9" |
| October | 49°F | 79°F | 63°F | 1.0" |
| November | 38°F | 68°F | 51°F | 0.9" |
| December | 30°F | 59°F | 42°F | 0.7" |
| Index | Seminole | Texas | National |
| Air quality index | 45 | 52 | 42 |
| Pollution index | 877,636 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 252 |
| Days with moderate air quality | 109 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Loop, TX | 291 | 45 | 10.0% |
| Seminole, TX | 7,683 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Gettysburg, PA | 7,684 | 42 | 16.0% |
| Fanwood, NJ | 7,686 | 51 | 2.0% |
| Colonie, NY | 7,686 | 37 | 26.0% |
| Plumas Lake, CA | 7,687 | 44 | 12.0% |
| Village St. George, LA | 7,688 | 45 | 10.0% |
| Seminole, TX | 7,683 | 45 | 10.0% |
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