| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 51°F | 37°F | 0.5" |
| February | 34°F | 64°F | 47°F | 0.5" |
| March | 43°F | 70°F | 54°F | 8.3" |
| April | 49°F | 73°F | 59°F | 6.5" |
| May | 55°F | 79°F | 65°F | 5.3" |
| June | 67°F | 89°F | 77°F | 7.4" |
| July | 70°F | 94°F | 81°F | 1.4" |
| August | 68°F | 91°F | 78°F | 0.4" |
| September | 64°F | 88°F | 75°F | 3.7" |
| October | 51°F | 78°F | 63°F | 1.6" |
| November | 40°F | 65°F | 51°F | 5.1" |
| December | 29°F | 52°F | 39°F | 2.6" |
| Index | Hammon | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 203,742 | 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 | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Butler, OK | 268 | 43 | 14.0% |
| Elk City, OK | 11,544 | 43 | 14.0% |
| Butler CDP, OK | 145 | 43 | 14.0% |
| Foss, OK | 163 | 43 | 14.0% |
| Strong City, OK | 23 | 43 | 14.0% |
| Hammon, OK | 499 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Shishmaref, AK | 499 | 38 | 24.0% |
| Midway, AL | 499 | 52 | 4.0% |
| Wilmot, AR | 499 | 34 | 32.0% |
| Ephesus, GA | 499 | 38 | 24.0% |
| Sorento, IL | 499 | 54 | 8.0% |
| Hammon, OK | 499 | 43 | 14.0% |
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