| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 45°F | 31°F | 2.3" |
| February | 23°F | 48°F | 33°F | 1.7" |
| March | 34°F | 61°F | 45°F | 3.3" |
| April | 43°F | 69°F | 54°F | 5.5" |
| May | 53°F | 78°F | 64°F | 9.9" |
| June | 64°F | 90°F | 76°F | 8.7" |
| July | 68°F | 94°F | 80°F | 7.6" |
| August | 66°F | 91°F | 77°F | 11.2" |
| September | 58°F | 84°F | 69°F | 5.7" |
| October | 45°F | 72°F | 56°F | 6.3" |
| November | 32°F | 58°F | 43°F | 3.4" |
| December | 21°F | 44°F | 31°F | 2.4" |
| Index | Frederick | Kansas | National |
| Air quality index | 40 | 47 | 42 |
| Pollution index | 214,073 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 301 |
| Days with moderate air quality | 64 |
| 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 | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Kanopolis, KS | 533 | 40 | 20.0% |
| Holyrood, KS | 461 | 40 | 20.0% |
| Lyons, KS | 3,504 | 40 | 20.0% |
| Bushton, KS | 313 | 40 | 20.0% |
| Lorraine, KS | 139 | 40 | 20.0% |
| Frederick, KS | 15 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Nikolski, AK | 15 | 31 | 38.0% |
| Scott, AR | 15 | 45 | 10.0% |
| Eagleville, CA | 15 | 29 | 42.0% |
| Concord, KY | 15 | 14 | 72.0% |
| Taft, LA | 15 | 45 | 10.0% |
| Frederick, KS | 15 | 40 | 20.0% |
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