| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 23°F | 46°F | 33°F | 1.1" |
| February | 26°F | 50°F | 36°F | 1.5" |
| March | 38°F | 62°F | 48°F | 2.6" |
| April | 47°F | 71°F | 58°F | 5.0" |
| May | 56°F | 78°F | 66°F | 6.5" |
| June | 66°F | 87°F | 77°F | 6.2" |
| July | 69°F | 92°F | 80°F | 4.3" |
| August | 68°F | 91°F | 79°F | 5.1" |
| September | 60°F | 83°F | 70°F | 4.4" |
| October | 48°F | 72°F | 59°F | 3.8" |
| November | 37°F | 60°F | 47°F | 2.4" |
| December | 26°F | 47°F | 35°F | 1.7" |
| Index | Humboldt | Kansas | National |
| Air quality index | 22 | 47 | 42 |
| Pollution index | 404,642 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 60 |
| Days with good air quality | 55 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Neosho Falls, KS | 113 | 22 | 56.0% |
| La Harpe, KS | 489 | 22 | 56.0% |
| Bassett, KS | 10 | 22 | 56.0% |
| Moran, KS | 479 | 22 | 56.0% |
| Gas, KS | 509 | 22 | 56.0% |
| Humboldt, KS | 2,162 | 22 | 56.0% |
| City | Population | Air Quality Index | National Avg. |
| Maple Lake, MN | 2,162 | 32 | 36.0% |
| Toftrees, PA | 2,162 | 44 | 12.0% |
| Whitesboro, AL | 2,161 | 43 | 14.0% |
| Bar Harbor, ME | 2,163 | 31 | 38.0% |
| Imperial, NE | 2,163 | 19 | 62.0% |
| Humboldt, KS | 2,162 | 22 | 56.0% |
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