| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 47°F | 29°F | 0.3" |
| February | 18°F | 49°F | 32°F | 0.5" |
| March | 26°F | 62°F | 42°F | 0.9" |
| April | 34°F | 68°F | 49°F | 2.1" |
| May | 44°F | 77°F | 59°F | 2.6" |
| June | 55°F | 89°F | 71°F | 3.0" |
| July | 61°F | 94°F | 76°F | 2.5" |
| August | 59°F | 90°F | 73°F | 2.7" |
| September | 50°F | 84°F | 65°F | 2.6" |
| October | 37°F | 71°F | 52°F | 1.5" |
| November | 26°F | 59°F | 40°F | 0.4" |
| December | 15°F | 45°F | 29°F | 0.6" |
| Index | Oakley | Kansas | National |
| Air quality index | 15 | 47 | 42 |
| Pollution index | 214,827 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 304 |
| Days with good air quality | 301 |
| Days with moderate air quality | 3 |
| 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 | 0.000% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Grinnell, KS | 274 | 15 | 70.0% |
| Oakley, KS | 2,070 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Pine Grove, CA | 2,070 | 39 | 22.0% |
| New-Wes-Valley, NL | 2,070 | n/a | |
| Atkins, IA | 2,069 | 39 | 22.0% |
| Watrous, SK | 2,069 | n/a | |
| Fox Creek, AB | 2,069 | n/a | |
| Oakley, KS | 2,070 | 15 | 70.0% |
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