| 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 | Martha | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 411,122 | 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 | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| East Duke, OK | 389 | 43 | 14.0% |
| Mangum, OK | 2,743 | 43 | 14.0% |
| Friendship, OK | 36 | 43 | 14.0% |
| Blair, OK | 660 | 43 | 14.0% |
| Headrick, OK | 70 | 43 | 14.0% |
| Martha, OK | 130 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Pitkas Point, AK | 130 | 31 | 38.0% |
| McKittrick, CA | 130 | 67 | 34.0% |
| Parrott, GA | 130 | 39 | 22.0% |
| Atlanta, KS | 130 | 40 | 20.0% |
| Beverly, KS | 130 | 32 | 36.0% |
| Martha, OK | 130 | 43 | 14.0% |
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