| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 39°F | 26°F | 2.0" |
| February | 24°F | 48°F | 33°F | 3.1" |
| March | 35°F | 63°F | 46°F | 8.4" |
| April | 40°F | 66°F | 51°F | 2.4" |
| May | 52°F | 80°F | 64°F | 7.5" |
| June | 62°F | 88°F | 73°F | 8.3" |
| July | 66°F | 93°F | 78°F | 11.9" |
| August | 67°F | 93°F | 78°F | 17.0" |
| September | 59°F | 87°F | 70°F | 7.6" |
| October | 45°F | 75°F | 57°F | 13.5" |
| November | 30°F | 61°F | 43°F | 1.2" |
| December | 19°F | 41°F | 28°F | 0.4" |
| Index | Ellis | Kansas | National |
| Air quality index | 15 | 47 | 42 |
| Pollution index | 95,096 | 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 | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cayucos, CA | 2,290 | 46 | 8.0% |
| Kensington, MD | 2,290 | 47 | 6.0% |
| Hide-A-Way Lake, MS | 2,290 | 42 | 16.0% |
| Spencer, IN | 2,289 | 42 | 16.0% |
| Jackson, KY | 2,289 | 33 | 34.0% |
| Ellis, KS | 2,290 | 15 | 70.0% |