| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 42°F | 30°F | 0.8" |
| February | 23°F | 45°F | 33°F | 1.6" |
| March | 36°F | 59°F | 46°F | 2.5" |
| April | 45°F | 68°F | 56°F | 4.4" |
| May | 55°F | 76°F | 65°F | 5.4" |
| June | 65°F | 87°F | 75°F | 6.1" |
| July | 68°F | 90°F | 79°F | 4.9" |
| August | 67°F | 89°F | 77°F | 5.2" |
| September | 59°F | 81°F | 68°F | 4.3" |
| October | 46°F | 69°F | 57°F | 3.7" |
| November | 35°F | 57°F | 45°F | 1.7" |
| December | 24°F | 43°F | 33°F | 1.8" |
| Index | Hillsdale | Kansas | National |
| Air quality index | 47 | 47 | 42 |
| Pollution index | 5,311,910 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 210 |
| Days with moderate air quality | 154 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Rantoul, KS | 216 | 41 | 18.0% |
| Wellsville, KS | 1,921 | 41 | 18.0% |
| Osawatomie, KS | 4,279 | 47 | 6.0% |
| Cleveland, MO | 784 | 47 | 6.0% |
| Gardner, KS | 21,936 | 47 | 6.0% |
| Hillsdale, KS | 284 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Cisco, IL | 284 | 44 | 12.0% |
| Moscow, KS | 284 | 15 | 70.0% |
| Anthoston, KY | 284 | 45 | 10.0% |
| Wahkon, MN | 284 | 29 | 42.0% |
| Augusta, MO | 284 | 54 | 8.0% |
| Hillsdale, KS | 284 | 47 | 6.0% |
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