| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 56°F | 40°F | 3.4" |
| February | 32°F | 59°F | 44°F | 4.3" |
| March | 42°F | 71°F | 55°F | 3.8" |
| April | 51°F | 79°F | 63°F | 8.5" |
| May | 60°F | 86°F | 72°F | 6.9" |
| June | 70°F | 96°F | 83°F | 8.9" |
| July | 73°F | 98°F | 85°F | 9.8" |
| August | 71°F | 97°F | 83°F | 4.2" |
| September | 64°F | 89°F | 75°F | 5.6" |
| October | 52°F | 79°F | 64°F | 8.2" |
| November | 40°F | 67°F | 52°F | 6.5" |
| December | 31°F | 54°F | 41°F | 3.6" |
| Index | Eldorado | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 578,842 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.150% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.040% |
| Mercury | 0.080% |
| City | Population | Air Quality Index | National Avg. |
| Chillicothe, TX | 771 | 26 | 48.0% |
| Quanah, TX | 2,377 | 26 | 48.0% |
| Gould, OK | 112 | 43 | 14.0% |
| East Duke, OK | 389 | 43 | 14.0% |
| Olustee, OK | 722 | 43 | 14.0% |
| Eldorado, OK | 474 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| McNeil, AR | 474 | 35 | 30.0% |
| Siloam, GA | 474 | 44 | 12.0% |
| Wapella, IL | 474 | 44 | 12.0% |
| Bentley, KS | 474 | 40 | 20.0% |
| Glasco, KS | 474 | 32 | 36.0% |
| Eldorado, OK | 474 | 43 | 14.0% |
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