| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 60°F | 47°F | 3.9" |
| February | 43°F | 65°F | 52°F | 11.6" |
| March | 50°F | 74°F | 60°F | 11.2" |
| April | 54°F | 78°F | 64°F | 2.4" |
| May | 64°F | 84°F | 73°F | 19.3" |
| June | 71°F | 91°F | 80°F | 32.6" |
| July | 72°F | 93°F | 81°F | 5.9" |
| August | 73°F | 95°F | 83°F | 20.9" |
| September | 69°F | 94°F | 80°F | 52.8" |
| October | 57°F | 84°F | 69°F | 0.5" |
| November | 50°F | 74°F | 60°F | 5.4" |
| December | 38°F | 66°F | 50°F | 7.0" |
| Index | Holland | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 4,598,870 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 284 |
| Days with moderate air quality | 79 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.070% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Jarrell, TX | 1,392 | 42 | 16.0% |
| Belton, TX | 22,173 | 42 | 16.0% |
| Little River-Academy, TX | 2,139 | 42 | 16.0% |
| Bartlett, TX | 1,658 | 42 | 16.0% |
| Rogers, TX | 1,396 | 42 | 16.0% |
| Holland, TX | 1,574 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Baden, MD | 1,574 | 47 | 6.0% |
| Cornersville, TN | 1,574 | 31 | 38.0% |
| Itasca, TX | 1,574 | 41 | 18.0% |
| Concord, AL | 1,575 | 53 | 6.0% |
| Taft, FL | 1,573 | 39 | 22.0% |
| Holland, TX | 1,574 | 42 | 16.0% |
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