| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 54°F | 44°F | 11.6" |
| February | 39°F | 60°F | 49°F | 2.6" |
| March | 48°F | 70°F | 58°F | 6.5" |
| April | 51°F | 73°F | 62°F | 5.8" |
| May | 63°F | 81°F | 71°F | 8.0" |
| June | 70°F | 90°F | 79°F | 11.0" |
| July | 71°F | 92°F | 80°F | 4.1" |
| August | 73°F | 96°F | 83°F | 1.9" |
| September | 67°F | 91°F | 78°F | 4.9" |
| October | 54°F | 80°F | 66°F | 6.8" |
| November | 47°F | 70°F | 58°F | 4.2" |
| December | 34°F | 60°F | 46°F | 5.3" |
| Index | Leonard | Texas | National |
| Air quality index | 325 | 52 | 42 |
| Pollution index | 723,856 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 138 |
| Days with good air quality | 120 |
| Days with moderate air quality | 17 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Westminster, TX | 768 | 51 | 2.0% |
| Blue Ridge, TX | 828 | 51 | 2.0% |
| Neylandville, TX | 170 | 51 | 2.0% |
| Celeste, TX | 1,124 | 51 | 2.0% |
| Trenton, TX | 669 | 325 | 550.0% |
| Leonard, TX | 2,554 | 325 | 550.0% |
| City | Population | Air Quality Index | National Avg. |
| Oasis, CA | 2,554 | 58 | 16.0% |
| Garland, UT | 2,554 | 44 | 12.0% |
| West Bishop, CA | 2,553 | 47 | 6.0% |
| Pennington, NJ | 2,553 | 41 | 18.0% |
| Odell, OR | 2,553 | 23 | 54.0% |
| Leonard, TX | 2,554 | 325 | 550.0% |
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