| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 60°F | 45°F | 1.9" |
| February | 37°F | 64°F | 49°F | 1.8" |
| March | 46°F | 73°F | 58°F | 3.5" |
| April | 53°F | 80°F | 65°F | 3.4" |
| May | 61°F | 85°F | 72°F | 3.8" |
| June | 70°F | 93°F | 81°F | 3.2" |
| July | 72°F | 97°F | 84°F | 2.7" |
| August | 72°F | 97°F | 84°F | 2.8" |
| September | 65°F | 90°F | 77°F | 2.8" |
| October | 54°F | 81°F | 66°F | 2.8" |
| November | 44°F | 70°F | 56°F | 2.1" |
| December | 35°F | 60°F | 45°F | 1.5" |
| Index | Graford | Texas | National |
| Air quality index | 33 | 52 | 42 |
| Pollution index | 1,399,310 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 329 |
| Days with moderate air quality | 33 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Perrin, TX | 122 | 33 | 34.0% |
| Millsap, TX | 305 | 33 | 34.0% |
| Palo Pinto, TX | 174 | 33 | 34.0% |
| Cool, TX | 150 | 33 | 34.0% |
| Mineral Wells, TX | 15,130 | 33 | 34.0% |
| Graford, TX | 689 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Westley, CA | 689 | 49 | 2.0% |
| Golden, IL | 689 | 41 | 18.0% |
| Hodge, LA | 689 | 34 | 32.0% |
| Brownsville, MN | 689 | 35 | 30.0% |
| Beemer, NE | 689 | 35 | 30.0% |
| Graford, TX | 689 | 33 | 34.0% |
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