| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 62°F | 52°F | 5.3" |
| February | 48°F | 66°F | 56°F | 6.4" |
| March | 53°F | 74°F | 63°F | 6.4" |
| April | 57°F | 78°F | 67°F | 3.6" |
| May | 66°F | 85°F | 74°F | 8.1" |
| June | 72°F | 92°F | 81°F | 6.8" |
| July | 74°F | 92°F | 82°F | 10.2" |
| August | 74°F | 94°F | 83°F | 6.0" |
| September | 72°F | 93°F | 81°F | 3.3" |
| October | 59°F | 84°F | 70°F | 1.6" |
| November | 53°F | 75°F | 63°F | 6.3" |
| December | 44°F | 67°F | 54°F | 4.7" |
| Index | Shenandoah | Texas | National |
| Air quality index | 52 | 52 | 42 |
| Pollution index | 70,353,000 | 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 | 0.210% |
| Benzene | 0.560% |
| Carbon Tetrachloride | 5.850% |
| Lead | 0.690% |
| Mercury | 0.960% |
| City | Population | Air Quality Index | National Avg. |
| Oak Ridge North, TX | 3,163 | 52 | 4.0% |
| The Woodlands, TX | 114,532 | 52 | 4.0% |
| Pinehurst, TX | 5,030 | 52 | 4.0% |
| Conroe, TX | 88,369 | 52 | 4.0% |
| Panorama Village, TX | 2,641 | 52 | 4.0% |
| Shenandoah, TX | 2,955 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Edgewood, FL | 2,955 | 39 | 22.0% |
| Wise, VA | 2,954 | 45 | 10.0% |
| Greensboro, AL | 2,956 | 35 | 30.0% |
| Valley View, PA | 2,956 | 41 | 18.0% |
| Normandin, QC | 2,956 | n/a | |
| Shenandoah, TX | 2,955 | 52 | 4.0% |
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