| 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 | Colby | Kansas | National |
| Air quality index | 19 | 47 | 42 |
| Pollution index | 37,946 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.000% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Levant, KS | 50 | 19 | 62.0% |
| Gem, KS | 120 | 19 | 62.0% |
| Colby, KS | 5,598 | 19 | 62.0% |
| City | Population | Air Quality Index | National Avg. |
| Frankenmuth, MI | 5,597 | 26 | 48.0% |
| Leakesville, MS | 5,597 | 42 | 16.0% |
| Buckhannon, WV | 5,599 | 31 | 38.0% |
| Northwood, OH | 5,600 | 40 | 20.0% |
| Indian Wells, CA | 5,595 | 89 | 78.0% |
| Colby, KS | 5,598 | 19 | 62.0% |