| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 63°F | 53°F | 5.5" |
| February | 50°F | 67°F | 57°F | 6.1" |
| March | 55°F | 76°F | 64°F | 5.5" |
| April | 58°F | 79°F | 68°F | 4.2" |
| May | 67°F | 86°F | 75°F | 10.9" |
| June | 73°F | 92°F | 82°F | 4.2" |
| July | 74°F | 91°F | 82°F | 8.4" |
| August | 75°F | 94°F | 83°F | 7.7" |
| September | 73°F | 92°F | 81°F | 3.5" |
| October | 61°F | 84°F | 71°F | 9.9" |
| November | 54°F | 76°F | 64°F | 4.3" |
| December | 45°F | 68°F | 56°F | 6.2" |
| Index | Stafford | Texas | National |
| Air quality index | 52 | 52 | 42 |
| Pollution index | 2,403,330 | 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 | 0.001% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Hedwig Village, TX | 2,732 | 52 | 4.0% |
| Bellaire, TX | 19,553 | 52 | 4.0% |
| Fresno, TX | 24,561 | 52 | 4.0% |
| Missouri City, TX | 77,696 | 52 | 4.0% |
| Spring Valley Village, TX | 4,398 | 52 | 4.0% |
| Stafford, TX | 17,266 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Knightdale, NC | 17,266 | 46 | 8.0% |
| Sunnyside, WA | 17,266 | 38 | 24.0% |
| Mount Vernon, OH | 17,264 | 41 | 18.0% |
| Southbridge Town, MA | 17,257 | 40 | 20.0% |
| Tahlequah, OK | 17,253 | 36 | 28.0% |
| Stafford, TX | 17,266 | 52 | 4.0% |
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