| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 69°F | 55°F | 5.0" |
| February | 49°F | 73°F | 59°F | 4.6" |
| March | 55°F | 78°F | 65°F | 4.8" |
| April | 62°F | 84°F | 72°F | 4.4" |
| May | 68°F | 89°F | 77°F | 6.5" |
| June | 73°F | 95°F | 83°F | 6.0" |
| July | 74°F | 95°F | 83°F | 8.1" |
| August | 74°F | 97°F | 84°F | 8.9" |
| September | 70°F | 92°F | 79°F | 6.1" |
| October | 62°F | 87°F | 73°F | 3.5" |
| November | 55°F | 77°F | 65°F | 4.7" |
| December | 48°F | 69°F | 57°F | 2.8" |
| Index | Tynan | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 1,901,300 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 102 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lake City, TX | 506 | 30 | 40.0% |
| Orange Grove, TX | 1,370 | 30 | 40.0% |
| Edgewater Estates, TX | 145 | 30 | 40.0% |
| Lakeshore Gardens-Hidden Acres, TX | 524 | 30 | 40.0% |
| Sandia, TX | 837 | 30 | 40.0% |
| Tynan, TX | 223 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Tillar, AR | 223 | 43 | 14.0% |
| Avera, GA | 223 | 47 | 6.0% |
| Alta Vista, IA | 223 | 15 | 70.0% |
| Ladora, IA | 223 | 39 | 22.0% |
| Acequia, ID | 223 | 20 | 60.0% |
| Tynan, TX | 223 | 42 | 16.0% |
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