| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 50°F | 35°F | 1.0" |
| February | 27°F | 54°F | 39°F | 1.6" |
| March | 38°F | 66°F | 51°F | 3.3" |
| April | 47°F | 74°F | 60°F | 5.1" |
| May | 56°F | 80°F | 67°F | 5.5" |
| June | 66°F | 90°F | 77°F | 5.8" |
| July | 69°F | 94°F | 81°F | 3.7" |
| August | 67°F | 93°F | 79°F | 3.8" |
| September | 59°F | 85°F | 71°F | 3.3" |
| October | 47°F | 75°F | 59°F | 3.8" |
| November | 36°F | 63°F | 48°F | 2.3" |
| December | 27°F | 50°F | 37°F | 1.8" |
| Index | Wynona | Oklahoma | National |
| Air quality index | 45 | 55 | 42 |
| Pollution index | 3,279,710 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 249 |
| Days with moderate air quality | 114 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Pawhuska, OK | 3,456 | 40 | 20.0% |
| Blackburn, OK | 89 | 40 | 20.0% |
| Avant, OK | 289 | 45 | 10.0% |
| Barnsdall, OK | 1,060 | 45 | 10.0% |
| Hominy, OK | 3,428 | 45 | 10.0% |
| Wynona, OK | 291 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Gillham, AR | 291 | 39 | 22.0% |
| Bass Lake, CA | 291 | 50 | = 100 |
| Holland, IA | 291 | 39 | 22.0% |
| Oakdale, IL | 291 | 43 | 14.0% |
| Millhousen, IN | 291 | 41 | 18.0% |
| Wynona, OK | 291 | 45 | 10.0% |
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