| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 49°F | 37°F | 6.5" |
| February | 31°F | 52°F | 40°F | 4.6" |
| March | 42°F | 63°F | 51°F | 7.3" |
| April | 49°F | 71°F | 59°F | 8.6" |
| May | 57°F | 77°F | 66°F | 11.2" |
| June | 67°F | 87°F | 76°F | 9.6" |
| July | 69°F | 91°F | 79°F | 10.8" |
| August | 69°F | 90°F | 78°F | 9.2" |
| September | 61°F | 82°F | 71°F | 10.4" |
| October | 49°F | 72°F | 59°F | 8.0" |
| November | 41°F | 61°F | 50°F | 6.4" |
| December | 31°F | 50°F | 39°F | 7.6" |
| Index | Eldon | Oklahoma | National |
| Air quality index | 36 | 55 | 42 |
| Pollution index | 454,845 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 291 |
| Days with good air quality | 269 |
| Days with moderate air quality | 22 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Dry Creek, OK | 153 | 36 | 28.0% |
| Park Hill, OK | 3,704 | 36 | 28.0% |
| Salem, OK | 142 | 36 | 28.0% |
| Wauhillau, OK | 420 | 36 | 28.0% |
| Chewey, OK | 395 | 36 | 28.0% |
| Eldon, OK | 151 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Kobuk, AK | 151 | 38 | 24.0% |
| Cutter, AZ | 151 | 60 | 20.0% |
| North San Juan, CA | 151 | 44 | 12.0% |
| Winterhaven, CA | 151 | 45 | 10.0% |
| Montezuma, CO | 151 | 47 | 6.0% |
| Eldon, OK | 151 | 36 | 28.0% |
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