| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 44°F | 34°F | 6.7" |
| February | 30°F | 51°F | 39°F | 3.3" |
| March | 42°F | 66°F | 53°F | 12.1" |
| April | 47°F | 69°F | 57°F | 5.1" |
| May | 59°F | 79°F | 68°F | 9.3" |
| June | 68°F | 86°F | 76°F | 16.1" |
| July | 69°F | 91°F | 80°F | 5.7" |
| August | 72°F | 95°F | 82°F | 8.9" |
| September | 64°F | 86°F | 74°F | 7.1" |
| October | 51°F | 74°F | 61°F | 6.6" |
| November | 40°F | 64°F | 50°F | 1.8" |
| December | 27°F | 47°F | 36°F | 2.9" |
| Index | Havana | Kansas | National |
| Air quality index | 38 | 47 | 42 |
| Pollution index | 121,713 | 989,153 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 289 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Wann, OK | 144 | 38 | 24.0% |
| Dearing, KS | 468 | 38 | 24.0% |
| Tyro, KS | 181 | 38 | 24.0% |
| Independence, KS | 8,595 | 38 | 24.0% |
| Elk City, KS | 268 | 38 | 24.0% |
| Havana, KS | 68 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Ekwok, AK | 68 | 31 | 38.0% |
| Union Grove, AL | 68 | 44 | 12.0% |
| Anthonyville, AR | 68 | 45 | 10.0% |
| Marie, AR | 68 | 45 | 10.0% |
| Keddie, CA | 68 | 46 | 8.0% |
| Havana, KS | 68 | 38 | 24.0% |
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