| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 59°F | 43°F | 1.0" |
| February | 33°F | 63°F | 46°F | 1.3" |
| March | 42°F | 73°F | 56°F | 1.8" |
| April | 50°F | 81°F | 64°F | 3.0" |
| May | 59°F | 87°F | 72°F | 4.4" |
| June | 69°F | 95°F | 82°F | 3.4" |
| July | 72°F | 99°F | 85°F | 2.4" |
| August | 72°F | 99°F | 85°F | 3.1" |
| September | 64°F | 91°F | 77°F | 3.7" |
| October | 52°F | 81°F | 65°F | 3.0" |
| November | 41°F | 70°F | 54°F | 1.3" |
| December | 31°F | 58°F | 43°F | 1.3" |
| Index | Dean | Texas | National |
| Air quality index | 26 | 52 | 42 |
| Pollution index | 294,890 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 345 |
| Days with good air quality | 308 |
| Days with moderate air quality | 37 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cashion Community, TX | 245 | 26 | 48.0% |
| Petrolia, TX | 415 | 26 | 48.0% |
| Henrietta, TX | 3,073 | 26 | 48.0% |
| Pleasant Valley, TX | 301 | 26 | 48.0% |
| Burkburnett, TX | 11,241 | 26 | 48.0% |
| Dean, TX | 461 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Akiachak, AK | 461 | 31 | 38.0% |
| Tees Toh, AZ | 461 | 45 | 10.0% |
| Bonaparte, IA | 461 | 29 | 42.0% |
| Holyrood, KS | 461 | 40 | 20.0% |
| New Germany, MN | 461 | 46 | 8.0% |
| Dean, TX | 461 | 26 | 48.0% |
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